Read the excerpts from Team Moon and the NASA article.

But now, because the landing was taking far longer than planned, the fuel was almost gone. Mission Control wanted Neil to take as much time as he needed and fly the LM as near empty as possible only because they wanted him to make the landing. But if he ran out of fuel above the surface, in all likelihood the LM would crash onto the moon.

When it comes time to set Eagle down in the Sea of Tranquility, Armstrong improvises, manually piloting the ship past an area littered with boulders. During the final seconds of descent, Eagle's computer is sounding alarms.

A reader can best combine the information in the excerpts to

understand that Neil Armstrong had to improvise the landing of the LM, named Eagle, while it was dangerously low on fuel.
understand that Neil Armstrong was not in control of the LM, named Eagle, while it was being landed on the moon.
understand that Neil Armstrong would crash the LM, named Eagle, if he ran out of fuel above the moon’s surface.
understand that Neil Armstrong had to pilot the LM, named Eagle, past an area on the moon littered with boulders.