I think A would be the correct answer. Your skin does not produce white blood cells, your body produces white blood cells and releases them into your blood system. Your skin does not also make T cells or antibodies. This all happens internally and they stay internal. Your body can absorb things like histamine, however I’m not sure how this would help to keep pathogens out of the body.
The answer to this question is, A. Physical!
In order to calculate your target heart rate, you must figure out your resting heart rate.
So {A} would be the best answer.
Um is there answers like u chose one a b c or d and if so what and i think i know the answer
