What is it called when one organism imitates the features or behavior of another?

Mimicry is the similarity of one organism (the mimic) to another (the model) that enhances the mimic's fitness through its effect on the behavior of a third party, the operator.

Explanation:

a close and long-term biological interaction between two different biological organisms, be it mutualistic, commensalistic, or parasitic.

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stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.