Why are wildlife needed for animals?

For maintaining a healthy ecological balance on this earth, animals, plants and marine species are as important as humans. Each organism on this earth has a unique place in food chain that helps contribute to the ecosystem in its own special way. But, sadly today, many of the animals and birds are getting endangered

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.