Nixon, Kennedy, and Reagan.
The correct answer is "B".
An arid region is characterized by having a severe lack of water. This cause an inability of the soil to make it possible for the plants to grow and subsequently animal life to exist. An Environment which is subject to arid climates is often known as a dessert. Most of these regions are located along the equatorial line.
Some think it was called this because of how the skin turned dark at the late stages of the disease, but it was more likely called "Black" to reflect the dark and horrible time in history.
The observation is a person is holding a spider. the inference is make is that he\she is about to feed it. my opinion is that it is the person pet.