Animals differ in their mouth parts,hence their ways of getting and eating food are different from one another...
Feed would imply that the animal is a predator, 'feeding' off another animal.
Eating food would imply that the animal is a herbivore, eating plants and 'dead' organisms.
most attack and eat there prey by mouth
some animals do but others eat already killed animals
it does not make its own food it feed on some other things like dust , dead animals and dead plants.
fungi bacteria viruses
Some contains chloroplasts while others don't. Some photosynthesize while others get food from other plants and animals. All protists contain a true nucleus and a cell membrane.
When food travels from the stomach back to the mouth, it is called regurgitation.In some animals, this is normally emesis, or vomiting. In ruminants such as cows, it is called chewing the cud. Birds normally regurgitate swallowed food to feed their young.
Monkeys feed on different types of food from fruits and plants, others feed on insects and some feed on other monkeys.
Some animals provide food and others are used for their fur
some animals do but others eat already killed animals
some animal get feed by there owner and some just eat stuff on land
some animals hibernate during the winter others that's when they get food
Algae provides food for some animals. For others, it can provide shelter.
Yes, ants are edible and there are some animals that have evolved to feed on them exclusively.
There is variation between species (and individuals) as some digestive systems are better at feed conversion than others. It also depends on the food source, some plants produce calories that are more bioavailable than others.
it does not make its own food it feed on some other things like dust , dead animals and dead plants.
Some animals eat grasses and other plants. Other animals feed on these animals that feed on plants. Some animals are omnivores ad feed on both plants and other animals,
The same reason that we need food, they need it to break down into energy and fat. Nutrients in the food such as calcium would be needed for strong bones and teeth which are vital for animals. Protein which is found in fish, meat and some vegetables, is needed for muscle growth. :)
Some moths feed on nectar from plants, and others from moist, rotting: fruit, meat and droppings.