It's C, the catalyst remains unchanged through a reaction.
Answer:
The structures that helps the plant ensure that it’s pollen is moved to other plants of the same species and that sexual reproduction will happen is the bright colored petals and sterility of carpel.
Bright colors of petals attracts the insects like bees, which helps the plant to transfer its pollen to other flower of the same species. In some plants, pollen matures earlier than its own stigma so the pollen transfer to other flowers.
