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Coevolution is defined as a process where at least two species influence each other's evolution over time.
Explanation:
1. Coevolution involves the reciprocal influence of two or more species on each other's evolution.
2. This interaction can lead to adaptations in both species that are responses to each other's presence.
3. Examples of coevolution include the relationship between flowers and their pollinators, predator-prey interactions, and host-parasite relationships.
4. Through coevolution, species can evolve together in ways that benefit both parties or result in arms races where each species continuously adapts to outcompete the other.
In the context of the given question, the correct answer is:
C. Change in which at least two things change over time
I hope this explanation helps you understand the concept of coevolution better. If you have any more questions or need further clarification, feel free to ask!