Why do photographers use umbrellas? what benefits do they offer?

An umbrella, again, is used for wide lighting which is not focused on one object

Answerthe third and fourth;

Well, in my opinion, i would think that african art should be displayed at any museums as if it was any other type of american art because slaves were forced to this country, which resulted and different cultures, so it shows the diversity of our country. the challenges that may come about is if it is not displayed as honor or if they american portrayed the art as something worse