Adaptations that an organism acquires by its own actions are:

Explanation

Adaptations that an organism acquires by its own actions are called acquired traits. These are changes or characteristics developed during an organism's lifetime due to use, disuse, habits, or environmental influences. For example, a person gaining muscle from exercise or a bird learning to sing a new tune are acquired traits. Unlike inherited traits, which are passed from parents to offspring through genes, acquired traits cannot be inherited. They only affect the individual and disappear with it, a concept first proposed by Lamarck but later disproved by modern genetics.