Frank has been feeling a great deal of stress lately because he has been struggling to meet his monthly expenses. naturally, then, he is ecstatic when he receives a raise at work. after a few weeks, though, he again finds himself struggling to make his credit payments. frank's situation is an example of?

The answer is the adaption-level phenomenon.

Explanation:

This phenomenon explains that people tend to adapt to new situations, but soon this situations becomes normal. When this happens, another problem arises, and it's possible people feel that they need another new experience to feel excited or interested.

Money is a common display of this phenomenon.  A person may always feel "they need more", until it becomes the norm again.

answer; the population in brazil is very diverse there are many races and ethnic groups

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