Appreciate your amicable attitude.
Not plant life. That's a huge part!
Here's my way of thinking about it. Every living cell has exactly the same structures. Animals all follow the same basic layout. For example, fish have two eyes. We have two eyes. Fish have two nostrils. We have two nostrils. Fish have a bone spine. We have a bone spine. Fish have a mouth. We have a mouth. Fish have a poop hole. We have a poop hole.
Not plant life. That's a huge part!