During breeding season, the sight of a red belly on a male stickleback fish will trigger an antagonistic response in other males. This is an example of

fixed action pattern

Explanation:

This is an example of a fixed action pattern. This is an ethological term that describes an instinctive behavior sequence that is highly stereotyped and species-characteristic due to it happening in the same manner countless times in a predictable cycle. These fixed action patterns are innate mechanisms triggered by a specific stimulus or releaser, which in this scenario is the sight of a red belly.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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