Answer:
Explanation:
When the body senses foreign substances (called antigens), the immune system works to recognize the antigens and get rid of them. B lymphocytes are triggered to make antibodies (also called immunoglobulins). These proteins lock onto specific antigens.
The best option I can think of will be 3 to 5 sessions per week.
Answer:
Physical activity helps prevent chronic illness, which reduces the need for medical treatment.
Explanation:
