Why can we only see one side of the Moon?

Answer: Its rotation matches its orbit

Its rotation matches its orbit ✓ — Correct! The Moon does rotate, but it takes exactly the same time (27.3 days) to spin once as to orbit Earth. Earth's gravity caused this 'tidal locking' over millions of years. So the same side always faces us. The far side gets sunlight too—we just can't see it from Earth.

Earth's gravity stops rotation — Wrong. Earth's gravity doesn't stop the Moon from rotating. Instead, gravity caused tidal locking over time, making the rotation period equal to the orbital period.

The far side is always dark — Wrong. The far side of the Moon receives sunlight just like the near side. It's not permanently dark - we just can't see it from Earth due to tidal locking.