Final answer:
The correct answer is option a) Assertive aggression.
Step-by-step explanation:
Most aggression in sport falls under the category of assertive aggression, which is a type of instrumental aggression. Instrumental aggression is motivated by achieving a goal and does not necessarily involve intent to cause pain. For instance, a player in a football game may aggressively tackle another to gain possession of the ball, with no intent to harm, but rather to contribute to the team's success.
On the other hand, hostile aggression is motivated by feelings of anger with intent to cause pain, which might be seen in situations outside of the competitive spirit of the game.