Explain how two caracters depend on each other

Plants and animals depend on each other for several reasons, including production of food, eradication of harmful pests and even propagation. Some interactions between plants and animals are detrimental, such as the serious injury or harm that occurs when animals eat toxic plants. Other relationships, however, like pollination, benefit both species.

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;