Question

An object accelerating only under the force of gravity is A) free fall or B) acceleration due to gravity

Answer 1

-- An object acted on by only the force of gravity, on or near Earth's surface,
accelerates downward at the rate of about 9.8 m/s² without air resistance.

-- That number is "the acceleration due to gravity, on Earth".

-- The object in that situation is said to be in "free fall".