If a body moves down with constant, Speed, its acceleration is

Explanation

The correct answer is 0. When a body moves with constant speed, its velocity does not change over time. Since acceleration is defined as the rate of change of velocity, a constant speed indicates that the acceleration is zero. Option A suggests the body is accelerating at the rate of gravity, which would imply a changing speed. Option B suggests an acceleration greater than gravity, which would also imply increasing speed. Option D is vague as it states the acceleration is constant but does not specify it being zero, which is necessary for constant speed.