Feeding is the process by which organisms, typically animals, obtain food. There are many types of feeding that animals exhibit, including:filter feeding - obtaining food suspended in the water columndeposit feeding - obtaining food particles in soilfluid feeding - obtaining food by consuming other organisms fluidsbulk feeding - obtaining food by eating pieces of other organisms or swallowing them wholephagocytosis - engulfing food with cell membraneAnother classification refers to the food groups some animals specialize in, such as:Carnivore - meatDetritivore - decomposing materialFolivore - leavesFrugivore - fruitsGranivore - seedsHerbivore - plantsInsectivore - insectsNectarivore - nectarOmnivore - plants and meatPiscivore - fishesSanguinivore - bloodSaprovore - dead matterEtc.There are also several food sources which have caused the development of specialized feeding behaviors, such as:Ophiophagy: feeding on snakesHematophagy: feeding on bloodCoprophagy: feeding on faecesCannibalism: feeding on members of the same speciesTrophallaxis: regurgitation of food to another animalPaedophagy: feeding on the young of other speciesLepidophagy: of fish, feeding on the scales of other fishIn many instances, the specialization of organisms in a specific type of food source has been one of the major causes of evolution of form and function, such as: