Which example is of a species changing over time?

Question

Responses

A birch tree in the forest reached its full mature height.
A birch tree in the forest reached its full mature height.

After the death of the chestnut trees, oak trees became the dominant species.
After the death of the chestnut trees, oak trees became the dominant species.

A ground level plant develops curling tendrils that wrap around other objects so it can "climb."
A ground level plant develops curling tendrils that wrap around other objects so it can "climb."

A morning glory plant is found curled around the post of a mailbox.

Answer 1

A ground level plant develops curling tendrils that wrap around other objects so it can "climb."