Some oxegyn is realeased. Carbon then mixes with water making glucose. The carbo in the glucose is then oxidized to carbon dioxide. In fermentation starts after glucose is oxide and it makes glycosis!
Courage is a virtue seems like the answer, but I haven’t read the book. Though, I’m making an education guess because it takes courage to go to the moon.
The answer is variant B verb because it exprime an action made by the subject.
Sergei's reaction is hostile. He is not interested in answering
