Question

doug is doing work. without knowing exactly what he is doing, which can be said about the work he is doing?
energy is transferred.
energy is increased.
energy is decreased.
energy is unchanged.

Explanation:

According to the work - energy theorem, when work is done, energy is transferred. Work is a form of energy transfer. The total energy of an isolated system is conserved (first law of thermodynamics), so energy is not increased or decreased in an absolute sense when work is done (it is just transferred from one form or object to another). And energy cannot be unchanged when work is being done as work is the transfer of energy.

Answer:

Energy is transferred.