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Answer:
Behavioral Perspective
Explanation:
The fact that "small changes are introduced in the child's environment" can be taken as a good example of behavioral perspective since the ones that work with this idea consider that evironment has an important influence in behavior. They have the conception that when interacting with a given environment an individual can develop certain attitudes and responses.
Cell are important to the body because cell are the building blocks of life that help the human body function ex muscle, Skelton eg