How have fruits contributed to the success of angiosperms?

Fruits have helped angiosperms spread their seeds.

Fruit bodies of plants are mature ovaries which is usually fleshy or not. the color/smell/taste of fruit attracts animals to eat the fruit and ingest the seeds. Through evolutionary processes plants “know” that animals travel, so when the animal poops out the seed, the seed will be able to germinate into a new plant in a new area, thus spreading it

protein synthesis is an example of feedback mechanism which in homeostasis

the answer to your question is:

c. complementary base-pairing