The length of a butterfly tongue perfectly matches the nectar tube of a flower it pollinates.This is an example of

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This scenario is an example of coevolution, where two species have evolved together in a way that benefits both. The butterfly and flower have adapted to each other, with the length of the butterfly's tongue matching the depth of the flower's nectar tube, allowing for efficient pollination. This is not an example of competition, as the two species are not in competition with each other, nor is it an example of amensalism (one species is not being harmed while the other is unaffected). Phenotypic plasticity refers to the ability of an organism to express different traits based on environmental factors, which is not applicable in this scenario.

The Length of a Butterfly Tongue Perfectly Matches the Nectar