American football catches and kills quarterbacks and ends the attack at the same time

What's the meaning of American football? What's the difference~
In catch and kill football, when a player of one side moves towards the end array of the other side with the ball and is intercepted by the other player, it is called catch and kill. At the same time, the current round of attack is ended, and the next round of attack starts from the number of yards captured and killed. Difference: catching and killing can be understood as grabbing the opponent's quarterback after the starting line. In fact, it refers to stopping the opponent's offensive player. In other wordsAll rules of American football
Rules: American football matches are played between two teams with a maximum of 53 players (NFL rules). Both sides send 11 players to play, and some or all of the players on the field can be changed at any time. The one who gets the ball control is the attacker, and the goal is to push the ball to the opponent's position as much as possibleHow many positions are there in American football
American football is divided into three groups: attack group, defense group and secret service group. There are 11 players in each group. The secret service team is usually seven people. The secret service team will send several players who are specially responsible for this duty to play under such special circumstances as playing free kicks, abandoning kicks and returning attacksQuarterback analysis in football
The quarterback is usually the brain, and sometimes he will personally take on the mission of scoring. Usually, the quarterback is intelligent and physically weak. Personally, he believes that the attack on the quarterback is the most ferocious quarterback. The quarterback is the position in football, like the organizing quarterback in basketball, who should have a good ability to observe the game and pass the ballWhy is the soul passer of American football called quarterback
The quarterback is directly behind the center. After receiving the ball from the center, he quickly retreats and organizes the attack. The quarterback is the core of the attack and the soul of the team. He is responsible for arranging tactics on the court and can call a timeout when necessary. When attacking, the quarterback can give the ball directly to the running frontWhat is a 4-point guard in football
Peyton Manning, a representative quarterback of NFL and a former American football player, has won five league MVP, two super bowl and one super bowl MVP Championships. Aaron RogersI want to know what happened to this football quarterback
In some cases, quarterbacks will line up at the position of tailback (TB) 7 yards behind the center, forming the so-called "shotgun formation", which is mostly an attack method of throwing and passing long balls. Quarterbacks in American football are like point guards in basketball. They shouldThe training methods of quarterback elements in American football also have some rules and pitching methods

How to divide the responsibilities of quarterbacks, catchers and running forwards in American olive? What roles do they play
A goal line is set at the first 10 yards of the end line, and the distance between the two goal lines is 100 yards. The goal is set in the middle of the end line, and the system is the same as that of British football. American football is better with ballsWhat offensive positions do NFL teams have
(1) This is the defensive position in the offensive team. The offensive linebacker will line up the defenders facing the other side - prevent the other side's defenders from catching and killing the quarterback, and the offensive linebacker can push away the other side's defense to create an offensive window for the offensive ball players. (2) Like quarterbacks, offensive linebacks cannot receive passes in the direction of attack. 5. Winger