Functionalism- <span>19th-century school of psychology influenced by Darwin's theory of natural selection that argued it was better to look at why the mind works the way it does than to describe its parts. Also used introspection.</span>
He could make sure he exercises regularly to keep the blood flow pumping to his heart, he can eat healthy so that he does not have a lot of fat build up in his arteries and he can also stay away from smoking to keep his body functioning properly.
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I believe the answer you are looking for is "case study"
A case study is a publication of an experience conducted over an amount of time. It could be based on behavior for each or a group.
Fiber and protein. If you have any answer choices, I'd suggest selecting protein