I do not know the answer but why not look the words up in the dictionary.
Two types of Figures of Speech are Metaphor & Simile
I don't exactly get what you are saying, so I'm practically guessing. If you restate I will gladly help you.
The answer is:
A. understand that managing the moon landing while the lunar module had 30 seconds left of fuel required intense concentration.
In the excerpts the narrator mentions the lunar module had 30 seconds left of fuel, so the people who were in charge of the moon landing could not make a mistake, a miscalculation or lose their extraordinary focus. For example, one of the narrators states the men "could not afford to be wrong." Otherwise, the mission could have failed.
