I think b would fit more as the mitochondria, d would be the endoplasmic reticulum, and e would be lysosomes
D: The reactions take place in the thylakoid of the chloroplast.
The total volume of the gas-exchanging region in the lung is called alveolar volume.
The alveolus is an air sack-like organ in the end of the respiratory airway. The alveolus is the site where gas-exchanging happens, so only air inside alveolus that will undergo actual exchange. Air in bronchus or trachea wouldn't do exchange
Answer:
it preserved and resourcefully used
