List an hypothesis for the origin of animals?

Thousands of years after the earth was created many small underwater creatures were created including shells, shrimp, jellyfish-like creatures etc. Then over the centuries and milleniums the animals grew bigger and adapted in different ways as they changed into land animals, with different diets(so this led to different types of teeth and poisons) and also different predators. This led to the dinosaurs and then throuughout history we have had Ice Ages. Some animals such as the crocodile have been able to survive this whole time since the dinosaurs. Later it led to monkeys and using Charles Darwin's theory we developed to differnet stages, including standing and shape of our head, also our technological/mechanical ideas. While the monkey or ape like creature changed into a human other animals changed in different ways to become some of the animals we have today. That is my hypothesis of the origin of animals