What is ‘predation’?

What is ‘predation’? Explain with the help of suitable examples why is it required in a community with rich biodiversity.

Predation is an interaction where one organisms (predator) kills and eats the other weaker organisms called prey. Predation is a natural way of transferring the energy fixed by plants, to higher trophic Examples-snake eating a frog, tiger killing and eating a deer. Predators keep prey population under control which otherwise could achieve very high population densities and cause instability in ecosystem.
They also help in maintaining a species diversity in a community by reducing the intensity of competition among competing prey species.