Answer:
1) respiration 2) photosynthesis.
Explanation:
My guess would have to be hydropower, since water isn't an un natural substance
oxygen flow is low and his lungs do not have a lot of capacity
<span>When practicing birth control as natural family planning, it is not true that it is almost 100 percent effective. Birth control as natural family planning does require careful tracking of the menstrual cycle, demands focus on bodily changes, and does require women from having sex on days ovulating and following. Even if sex is is had outside ovulating days, it is possible to get pregnant, thus it is not 100 percent effective.</span>
