Odd 1. 2.
Energy is the ability to do work, and doing work on something gives it energy.
Relative to the bus, the person has no kinetic energy because the person is at rest relative to the bus. Relative to the ground, however, the person does have kinetic energy because the person is moving with the same speed as the bus. A kWhr is a unit of work, and since energy is the ability to do work, it is also a unit of energy. In terms of units, a watt is a joule per second, and an hour is a unit of time that can be expressed in seconds. The time units cancel, leaving a unit of joule, which can be used to measure either work or energy.