Correct answer: D). Co-evolution
The co-evolution is the process of reciprocal revolutionary changes that are known to occur between the two or more species. The activity of each species, which participate in the interaction, applies a selection pressure to the others. It is one of the primary methods by which biological communities are organized.
Example: Predator-prey relationship, in this relationship, there is selective pressure on prey in order to avoid capture. As a result of that, the predator must adapt to become a more effective hunter.
Hence, the correct answer would be option A.
