Correct option is D
The Angle of Repose is defined as the minimum angle of an inclined plane with the horizontal at which an object placed on it just begins to slide. It represents the equilibrium condition where the gravitational force acting down the incline is exactly balanced by the frictional force. Beyond this angle, the object will start to slide due to insufficient frictional force to hold it in place.
Angle of elevation refers to the angle between the horizontal and the line of sight looking upwards.
Angle of friction is related to the frictional forces between two surfaces but is not specifically about the sliding motion on an inclined plane.
Angle of latitude is unrelated to mechanics and refers to geographic coordinates.
Thus, the correct term for this condition is the Angle of Repose.
