The correct answer is A. poor.
The word “poor” means “not having enough money or possessions.” It can also be used to describe something that is of low quality or value. In this case, the area is well known for plentiful rain, which means that it is not poor in terms of rainfall.
The word “impoverished” means “very poor.” It is often used to describe people who are living in poverty. In this case, the area is not impoverished because it is well known for plentiful rain.
The word “scarce” means “not found in large amounts.” It can also be used to describe something that is difficult to find. In this case, the area is not scarce in terms of rainfall.
The word “miserly” means “not willing to spend money or give away possessions.” It is often used to describe people who are very stingy. In this case, the area is not miserly because it is well known for plentiful rain.