Hey there! The answer is A Hot Spot, because it was formed by a volcano in areas where plates do come together, and perhaps sometimes volcanoes form.
Answer: a. Increasing the surface area for diffusion
Explanation:
When the air is inhaled through the nostrils, the air containing the oxygen the air diffuses inside the alveoli. The alveoli are the tiny sacs where air enters and exchange of gases takes place. From the alveoli the oxygen enters into the blood stream. The oxygen is utilized by the cells for respiration. The increase in network and number of the alveoli will increase the surface area for the diffusion of oxygen and hence, will speed up the respiration process.
Sorry I am late on answering the question, if u don’t know what it is still, the answer I believe is D!