The form of Nutrition differs depending on type of and availability of food material as well as how it is obtained by the organism.
Heterotrophs obtain their nutrition from the other sources like plants or animals. They cannot create their own food. They do not perform photosynthesis. Except for producer all the consumers that are herbivores carnivores and omnivores are considered heterotrophs, and decomposer as well because decomposers also obtain their food from decaying organisms and natural element.
Heterotrophs are classified into 3 types
Saprotrophs - saprotrophic nutrition is that nutrition in which an organism obtain in nutrition from decaying organism matter of decayed plant and animal.
Example- Fungi, mushroom, yeast.
Parasyte- it is the nutrition in which organism get its food from other living organism without killing it.
Example- a host may be a plant or an animal parasitic mode of nutrition is observed in several fund, bacteria and in a few plant like cuscuta and some animals like plasmodium, roundworm these causes diseases like malaria.
Holozoic- the holozoic nutrition is in which organism takes a complex organic food into its body by the process of injection the ingested food got digested and then observe into the body cell by the organism and then excreted by different processes.
Example- human, amoeba , animals, etc.