In the latter case the resistance is caused by dissipation of mechanical energy when the configuration or the direction of flow is sharply changed, by the formation of vortices and secondary flows as a result of the flow breaking away, by the centrifugal forces, etc.
Animals depend on plants for food as plants produce food and energy which animals can't, so, herbivores eat plants to get energy, carnivores eat herbivores and other carnivores for energy and omnivores eat all four, plants, herbivores, carnivores and also other omnivores for energy.
Both living and non-living things make up the environment. Basic Needs of Animals Pages 40-45 What are the basic needs of animals? Food Water Shelter Oxygen Appropriate climate for survival An animalâs environment helps the animal meet its needs. The environment is everything that surrounds and affects the animal. This includes plants, other animals, rocks, soil, air, climate, and water. Both living and non-living things make up the environment.