What is the role of the assistant referee?

The role of the assistant referee primarily revolves around supporting the referee, particularly in making decisions regarding offside. Assistant referees have a crucial responsibility to monitor the positions of players during the match, especially when the ball is played. Their vantage point allows them to determine if an attacking player is in an offside position relative to the second-to-last defender at the moment the ball is played. This is vital for maintaining the flow of the game and ensuring the correct application of the offside law, which is designed to prevent unfair advantages.

While assistant referees may also have other minor duties, such as signaling for throw-ins or corner kicks, their main focus in terms of decision-making consistency is on offside situations. Their input can significantly affect the game's outcomes, making their role essential in ensuring fair play. The other choices do not accurately reflect the primary responsibilities assigned to an assistant referee.