A diagram showing limited variations of life developing from the creation model would appear as:

O a tree

O a forest of unique trees

O a tree with different branches

A forest of unique trees.

Explanation:

Must be a forest, because should contain multiple trees, meaning multiple species created already from the beginning according to creation model. All existence wasn't from one single living being, but it was from multiples because that supreme being created.

I think it is a tree with different branches.