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.
Asker's rating. 1  animals still depend on the sun for energy since, all living things, need heat energy to maintain their body temperature and that the energy coming from the sun which is light energy is so far the most important energy for all beings on earth to live. Angela Â· 2 years ago.