Hello help me!!,,,,,,,.,.,<br>
,<br>
Hi she md
son4ous [18]
We can’t see the question
Answer: A
Explanation: The blood–air barrier (alveolar–capillary barrier or membrane) exists in the gas exchanging region of the lungs. It exists to prevent air bubbles from forming in the blood, and from blood entering the alveoli. ... The barrier is permeable to molecular oxygen, carbon dioxide, carbon monoxide and many other gases.
Trees my good sir. Have trees planted regularly, and temporarily block the use of gasoline powered cars! Modes of travel to electric and sea. I guess that's just my view. Also! cut down on pesticides
I'd have to say d. the hand, because every human (for the most part, no offence intended to anyone) has a hand and is able to make good (or bad, rather) use of it. It's what a person always has access to at any given time or place, even if they don't have access to one of the other options.
Answer:
hi I would love to answer your question but it is not clear enough for me to understand
