The red maple tree is a flowering plant. The longleaf pine tree is a nonflowering plant. Both trees go through various stages in their life cycles. Which stage occurs in the life cycles of both trees?

making seeds

Explanation:

The plant that bear flower at least once during its life cycle, it is said to be a flowering plant. Bearing flower is an essential part of the process of reproduction of a flowering plant.

The plant that never bear a flower in its life cycle but still is able to produce the seeds, is said to be a non-flowering plant.  

The fact common in both the flowering and non flowering plants is that both of them produce seeds.

nobody can answer this if you dont show us the shapes