The diagram shows a person holding a bow and arrow.

which will most likely increase the kinetic energy in this system?

pulling farther back on the string
releasing the string
holding the arrow higher
decreasing the mass of the arrow

releasing the string

Explanation:

In a bow-arrow system, the potential energy stored by pulling the string backwards gets converted to kinetic energy when the string is released. Thus, more the string is pulled backwards, more potential energy would be stored. When the string is released, the potential energy reduces and converts to kinetic energy. Therefore, by releasing the string, the kinetic energy increases.