B. Soil Contamination
All the other answers are talking about clean and pure things while this answer is the only negative one. So B is your answer.
<span>Adrenaline can change many things including increasing blood pressure, heart rate, reflexes, physical and psychological capabilities, and many more. When under stress, adrenaline is released to help the body defend itself from that stress. That's why when children are drowning, for example, those saving them must be extremely careful because a child can due to adrenaline become even stronger than an adult and can accidentaly drown the adult.</span>
Answer:
A. He has a large buildup of lactate in his muscles.
Explanation:
Ideally, our body cells, via the process of aerobic cellular respiration, need oxygen to break down glucose. However, during rigorous activities or exercises, oxygen can become unavailable for use. In this case, the body cells switch to use another way of cellular respiration, which is FERMENTATION.
This fermentation causes a build up of lactic acid/lactate (its byproduct) in the cells of the muscles being used, which physically causes a burning and aching sensation just as the case of this hiker. The climbing of the steep path is causing causing the fast usage of oxygen in his cells.
<span>In order for the muscle fatigue to end the muscle cells must be provided with oxygen to 'burn' the lactic acid.
Hope this helps!
-Payshence xoxo</span>
No that's the respiratory system
