Question

earth is not a perfect circle. due to the ______ gravitational pull, earth bulges out at the sides closest to and farthest from the moon. this distorting pull is known as a tidal force, and it is responsible for the changes in some tides that are called high and low tides.
which choice completes the text so that it conforms to the conventions of standard english?
choose 1 answer:
① moon’s
② moons
③ moonis
④ moon

Explanation:

We need to choose the correct possessive form to show that the gravitational pull belongs to the Moon. The correct possessive form of "Moon" (when referring to the Earth's Moon, a singular noun) is "Moon's" to indicate ownership (the Moon's gravitational pull). "Moons" is plural (referring to multiple moons), "Moon" is the singular noun without possession, and "Moons'" would be the plural possessive (for multiple moons), which doesn't fit here as we are talking about the Earth's Moon (one moon).

Answer:

③ Moon's