Answer:b) The air at high altitudes are less dense, so its harder to breathe.
Explanation:
AS altitude increases, the air pressure drops. This reduces the amount of gas molecules in the air so the air becomes less dense compared to air closer to sea level.
D. All of the above are true.
1) Fine flour and lumpy flour - B) Sieving
2) Mixed nuts - A) Handpicking
3) Sand and gravel - B) Sieving
4) Sand and palay - B) Sieving
5) Scrap iron and nail - C) Using magnet
(mark me brainliest if you're satisfied with my answer :))
<span>Matching coastlines of continents
Similar land features across continents
Evidence from fossils
Evidence from climate</span>
<u>Answer</u>:
Option B. a positive feedback loop
<u>Explanation</u>:
This happens when the product of the reaction is more than that of the reaction. In homeostasis this type of positive feedback loop that can move away. It exacerbates the effect of small disturbance. It also strengthens the change in physiological condition body rather than reversing the change. A slight change in the normal range will result in greater change, and hence the system diverts more from the normal range. It can only be considered normal with definite end point.
