We get tired after exercise because our muscle fibers get tired very quickly. This is due to the major source of energy for the muscle tissue, called adenosine triphosphate, or ATP. As the muscles make use of this supply of energy, they get tired and fatigue.
Answer:
virus
Explanation:
viruses are the smallest type of pathogen
Those things usually contain kasine which is known to have addictive properties
Your answer is D. All the above
