All animals survive and respond to the environment in seven different ways. Animals carry out the following essential functions: feeding, respiration, circulation, excretion, response, movement, and reproduction.
Feeding: Animals have evolved a variety of ways to feed. Herbivores are animals that eat plants, including roots, stems, leaves, flowers, and fruits. Carnivores consume other animals. Filter feeders are aquatic animals that strain tiny floating plants and animals from the water around them. …
