Question

Rich fishing grounds have developed in places where warm and cold ocean currents meet.

Answer 1

Places where warm and cold currents meet are favourable to the existence of tiny organisms known as plankton. These plankton are a rich source of food for the fish. Hence, more fish are found in such areas, which have developed as rich fishing grounds. For example, the Newfoundland coast is the richest fishing area where warm the Gulf Stream meets the cold Labrador Current.