Why does the Moon’s orbital period relate to Earth’s mass?
Kepler’s third law (T2 = 4π2GMEr3) to satellites like the Moon, where the period T depends on Earth’s mass ME, the central body, determining the gravitational force strength. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Earth’s mass determines the force. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.