Which action is is taken by an offensive player in the game of lacrosse

The player attacks the opponent's goal.

Explanation:

An offensive player is one whose function is to score goals on the opposing team. He can also be called "striker", although this term is most commonly used in football. In short, as you know, in a team each player has a role, the offensive player has a goal scoring function, so this is the action that the audience and the team expect from him.