The correct options are
A Shape
B Muscular
C Contact
D Gravity, Friction
a. To stretch the bow, the archer applies a force that causes a change in its shape.
b. The force applied by the archer to stretch the bow is an example of muscular force.
c. The type of force responsible for a change in the state of motion of the arrow is an example of a contact force.
d. While the arrow moves towards its target, the forces acting on it are due to gravity and that due to Friction of air.