To start a body moving, which of the following must be overcome?

To initiate the movement of a stationary object, static friction must be overcome. Static friction is the force that resists the start of motion between two surfaces in contact when there is no relative movement. It acts to prevent an object from sliding due to an applied force, and it must be overcome for the object to begin moving.

Once the object is in motion, different types of friction come into play, such as kinetic friction (which acts on moving objects) and other forms like rolling or fluid friction, depending on the nature of the movement and the surfaces involved. However, the critical factor when starting the movement of a body is overcoming the static friction that resists the initiation of motion. Thus, the correct answer highlights the role of static friction in the physical movement of objects.