Global warming has been hypothesized to cause many plants to flower earlier. If bees search for food earlier in response to this, this would represent within the community.

Coevolution

Explanation:

Coevolution is the phenomena in which two interacting species evolve under the influence of each other.

Global warming caused a drastic rise in temperature. The temperature condition during the original flowering season became higher than the optimum flowering temperature. So, the flowering plants began to flower earlier.

This created a food crisis for bees who were adapted to collect food during the flowering season. However, they evolved along with the flowering plants and started searching food earlier.

So we can say that evolution of  flowering plant caused the evolution of bees.So it is a coevolution.

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