A--when someone hike, how will the altitude affect your body?
its affect on these systems are concern ofthis question:
nervous system, kidneys and urinary system, endocrinesystem .

When someone hike and goes to a higher altitude than usual, it affects the heart rate and it becomes more difficult to breath. In higher altitude there is less oxygen and so this affects breathing. People get more tired because the source of oxygen is less in higher altittudes.

Sympatetic nervous system increases its activity, that is why heart and blood presure rate increases. There is also a pulmonary vasconstriction and during excercise it may lead to pulmonary hipertension.

Altitude can increase urinary output. The bodys kidneys respond to lower oxygen by producing more red blood cells to increasing oxygen. To make room for the new cells the body eliminates through urine.

Explanation:

When hiking in high altitudes, while people try to breathe heavily to get more oxygen they fail because there is a lack of it. Threre is less oxygen throughout the respiratory system and this afects the muscles and limits excersise preformance.

b is the best answer for this question.

it would be rhyolitic hope this