The Lion King

Mufasa: Everything you see exists together in a delicate balance. As king, you need to understand that balance and respect all the creatures, from the crawling ant to the leaping antelope.
Young Simba: But, Dad, don't we eat the antelope?
Mufasa: Yes, Simba, but let me explain. When we die, our bodies become the grass, and the antelope eat the grass. And so we are all connnected in the great Circle of Life.

(My favorite animated movie of all time)