What does "A's goal line" refer to in a football game?

In football terminology, "A's goal line" specifically refers to the line that the offensive team (Team A) is defending, which is also the line they must reach in order to score a touchdown. This means it represents the boundary that marks the beginning of the end zone where Team A's offensive plays must progress toward. The goal line is crucial for determining a touchdown’s success, as the ball must cross this line for a score to be made.

This understanding is essential since it signifies that Team A is moving the ball towards that goal line while being defended by Team B. Being clear on the distinction between the goal line that a team is defending and the one they are attacking is fundamental in understanding game strategies. If Team A is pushing toward the opponent's goal line, they are actively attempting to score, while Team B is working to prevent that from happening.