What property is responsible for the non-spherical shape of Phobos and Deimos?

Answer 1

The property responsible for the non-spherical shape of both the moons is the planet Mars doesn't have a strong enough gravitational influence over the moons to make them spherical. This is also why they have a highly eccentric orbit.

Answer 2

The property responsible for the non-spherical shape of Phobos and Deimos is their low gravitational pull, as they are irregularly shaped asteroids. Their small size and weak gravity result in irregular shapes rather than the more spherical shapes of larger celestial bodies like planets.

Answer 3

Their gravity fields are too weak to pull their material into a spherical shape