Statement A : Energy is the cause for doing work and work is the effect
Statement B : Energy is a scalar but power is a vector quantity.

A person is doing work on a body means the person is supplying energy to the body and energy was stored in the body of the person. one end of a spring is attached to a wall and the other end is attached to a block kept on a horizontal surface. Initially the spring is stretched, now it is released. The spring is doing work on the block and this energy is derived from the elastic P.E. stored in the spring. Energy has magnitude only, no direction, so it is scalar. power is rate of doing work, so it is also scalar. Power is the dot product of force and velocity.