Mental disorder im pretty sure
C.
when you are visualizing, you are no longer focused in reality.
Abstinence is the most effective method of preventing STDs and pregnancy. In any sexual education courses, abstinence is the most suggested form of preventing these things from happening. When a person consciously chooses to make this decision it will always lead for the better good. Some religious groups also practice this method. This is not to deprive a natural human need, but rather to instill a value in individuals, especially the young ones, that there is really no rush to be doing this and the right time will always be waiting.
Answer:
The answer is B, To ensure that blood flows in one direction.
Explanation:
Your valves are there to prevent backwards blood flow and keep your blood moving all in one direction.
