The correct answer is "coevolution."
Some Latin American hummingbirds have bills that are long and curved matching long and sharply curved flowers in their environment. The hummingbirds can easily sip nectar from the flower while conducting pollination. These two organisms may have evolved by coevolution.
This scientific term means that two or more species evolution happened at the same time for specific circumstances appropriate to its characteristics and functions. We can assume that this coevolution is an intelligent aspect of species that developed complementary characteristics.
The other options of the question were a) adaptive radiation, b) convergent evolution, and c) divergent evolution.