They are Autotrophs.
An autotroph is any organism that derives their energy from either the sun (like plants), or chemicals (some bacteria). These would be phototrophic or chemotrophic, respectively.
Autotrophs are providers or primary producers.
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parasites
Heterotrophs are organisms that depend on other organisms for their source of food and nutrition
Heterotrophs are organisms that cannot make their own food so they must depend on other organisms for nutrients.
They depend on FOOD and DISSOLVED OXYGEN.
Actually, the answer for this question is so opened, but I'll answer generally. There are food chains, food webs, predator - prey, adaptions and many more relationships between the organisms. Organisms of same species depend on each other for mating, housing and survival (a group of zebras, for example). Organisms of different species might depend on others for food (Predator - Prey relationship; the food chains and food webs). Some organisms exchange benefits with each other (as the Bacterial noodles in the roots of leguminous plants). Some organisms depend on the other species' way of life for their survival (after a lion feeds on a zebra, the remains can be a good meal for falcons). There are also some adaptions that the organism trick the other with, to survive or defend itself against the predators (as the octopus change it's color to hide from sharks).
they depend for food
Living organisms depend on other living organisms as food sources. AN overpopulation of a certain living organism or a decrease in a population of an organisms may unstable the other organisms that depend on it for food.
parasites
Heterotrophs are organisms that depend on other organisms for their source of food and nutrition
they depend for food
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The living organisms depend on each other for their food & shelter. EG: Fungi and algae depend on each other .
Heterotrophs are organisms that cannot make their own food so they must depend on other organisms for nutrients.
An animal that consumes(eats) food to survive, that depend on other organisms for food.
Living organisms that depend on other animals or plants for their food is called heterotrophic nutrition
Heterotrophs. These organisms derive their food from autotrophs,that is, the plants. They include- Carnivores, herbivores, omnivores, scavengers, decomposers.
For food! If there were a surplus on coyotes rabbits (or whatever the coyotes ate) would die out in that area so the coyotes would run out of food and kill each other or die of hunger then as the coyotes were dieing off the rabbits would come back!