Answer: D
Explanation:
Now a days people use the internet to pre-plan an appointment as its fast and convenient
Larry is taking a walk in the park. The pollen in the air makes him sneeze constantly. The line of defense that is his immune system exhibiting is that of "(A) first line of defense." There are only 3 lines of defense in the immune system. The first line of defense are a combination of physical and chemical barriers that prevent all types of foreign agents from penetrating the outer layer of the body. In this case, it is the nasal cavity.
A. This is the correct response.
...lower density areas that separate residential and commercial areas from one another.
