I believe it's the last two. "makes the lungs able to fill more completely" and "helps the blood vessels dilate more easily" hope this helps, have an amazing day :)
Answer:
A twist of tissue is a sprain.
Explanation:
When you sprain a wrist or ankle, its a wrench or twisting of a ligament violently that causes pain and swelling but not dislocation.
Answer:
Strong selection for change is acting on this gene.
Explanation:
Answer: obligate anaerobes. I hope this helps. I believe this is the correct answer.
