Why does earth have such a diversity of plant and animal life? give three reasons.

Earth has water. This is crucial to diversity. It also has many climates and ecological niches.

1) The climate of the area can effect the way plants grow, and animals live.

2) For plant diversity it would be because of cross pollination. For animals it would be because of cross breeding.

3) And lastly, because of the wondrous way God made the world.