Which of the following terms describes a situation where two species interact in a way that causes natural selection to act on each other (meaning that allele frequencies change in response to the interaction)?

Coevolution

Explanation:

Coevolution is the result of an evolutionary change given by the interaction between two (or more) populations over time. These populations are usually from different species (plant–pollinator, predator–prey, host–parasite), this means that a change in a plant can affect the animal that consumes it.

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they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.