Indirect aggression involves:

Indirect aggression is characterized by aggressive acts that do not involve physical contact with opponents but rather target other elements within the sport context. This can include actions such as deliberately hitting equipment, for example, slamming a racket on the ground in tennis or kicking a ball away in frustration during a soccer match. Such behavior illustrates a form of aggression that expresses frustration or attempts to disrupt the game indirectly rather than confronting an opponent directly.

The other options focus on different aspects of sport and skill. Physical contact with opponents clearly describes direct aggression, as it involves intentional harm or confrontation with another player. Resourceful playing strategies and enhancing communication in teams relate to tactics and teamwork, which are not inherently aggressive in nature, highlighting collaboration and skill enhancement rather than aggression. Therefore, the option that refers to aggressive acts towards equipment accurately reflects the nature of indirect aggression in sports.