The Moon's tidal shape
Claim in the list: The Moon is slightly flattened like a lemon because of Earth’s ancient gravitational influence.
Verification: Partly supported, but “lemon” is a loose analogy. The Moon is slightly elongated along the Earth–Moon axis and has a complex, non-spherical shape. NASA describes mutual tidal stretching of the two bodies; the Moon’s solid body sustains a present deformation, while an older fossil bulge is linked to its earlier proximity to Earth and faster rotation. “Flattened” can incorrectly suggest ordinary polar flattening.
Conclusion: Earth’s tidal influence helped shape a small elongation in the Moon. “Slightly egg-shaped” is more accurate than literally lemon-shaped.