Which part of the bow transfers energy to the arrow?

The limbs of the bow play a crucial role in transferring energy to the arrow. When an archer draws the bowstring back, the limbs are flexed and store potential energy. Upon release of the string, this energy is converted into kinetic energy as the limbs return to their relaxed state, propelling the arrow forward. The effective energy transfer largely depends on the design and material of the limbs, making them integral to the overall performance of the bow.

In contrast, the riser serves as the central part of the bow that holds components like the grip and the sight but does not have a direct role in energy transfer. The string is essential for launching the arrow, but it is the limbs that provide the primary energy source as they bend and recover. The sight helps the archer aim but does not influence energy transfer during the shot. Therefore, the limbs are the correct answer as they are the components directly responsible for transferring energy to the projectile.