Answer: C: rock climbing E: free diving
F: hiking
Explanation:
Rock climbing is a sports activity in which the participants climb up the mountain or hill, or a rocky wall of a appreciable height. The goal of this sport is to reach the highest point or the endpoint in shortest time.
Free diving is the sport, in which the person dives inside the water by holding breath for long until the person reaches over the surface layer of the water body. This practice is different from scuba diving as no breathing apparatus is used in free diving.
Hiking is a sport in which the individuals walk for long to cover a long distance, without using any vehicle in the journey.
The above mentioned sports can only be performed by the participants who are healthy and fit. Their respiratory and cardiovascular system should be free from any disease or disorder so that they can complete their tasks in the sports without becoming weak. Their muscular and skeletal system should also be sound which can facilitate easy and flexible movements during the beginning of the sport.