Correct Answer: fertilizer running off from a large agricultural farm
Antigens are any molecules that elicit adaptive immune response. Antigens protrude from pathogens or other intruding substances. Antibodies are proteins found in blood plasma that attach to one particular kind of antigen and help to counter its effects.
His behavioral changes that he can make is being determined to eat right exercise and have a positive mind set everyday
Warm up is what you do before you begin a sport or start exercising and a cool down is referred to cooling your body down AFTER playing a sport or exercising