I think the correct answer from the choices listed above is option A. In plants, the purpose of auxins is to produce phytochrome. The main function of auxin is to help plants grow. Auxin stimulates plant cells to elongate, and the apical meristem of a plant. Hope this answers the question.
Decrease in the tree population can damage the environment.
The final stages of mitosis which match your description are telophase and cytokenesis.
