D . Found both in whales and sharks. There two kinds of animals need continously swim in water for the search of food, mate, Prey. For this purpose they need and continuous supply of energy for their body tissue especially their muscular system. Therefore their tissues actively carry out electron transport chain. Solution D . Found both in whales and sharks. There two kinds of animals need continously swim in water for the search of food, mate, Prey. For this purpose they need and continuous supply of energy for their body tissue especially their muscular system. Therefore their tissues actively carry out electron transport chain..