Endurance is important for participating in sports because it
a. provides the energy needed to maintain physical activity for long periods of time
b. decreases the amount of nutrients and oxygen to the tissues
c. allows you short spurts of energy to be released
d. allows slow releases of energy for a small amount of time

The correct answer is A. Provides the energy needed to maintain physical activity for long periods of time.

Endurance is defined as power or strength that enables a person to withstand  any stress or harsh situation.

As sports require lot of muscular and cardiovascular activities, therefore endurance is important for participating in sports.

Thus, it provides energy needed to maintain physical activity fro long period of time.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.