Final answer:
The sequence of energy transformations in a coal-fired power station is chemical, to thermal, to kinetic, and finally to electrical energy, making the correct answer option C.
Step-by-step explanation:
In a coal-fired power station, the sequence in which energy transformations normally occur is from chemical, to thermal (heat), to kinetic (mechanical), and finally to electrical energy. Initially, the chemical energy stored in the coal is released as thermal energy when the coal is burned. This thermal energy generates steam which then provides kinetic energy to turn turbines. These turbines are connected to generators that convert the kinetic energy into electrical energy. Accordingly, the correct sequence of energy changes in a coal-fired power station is represented by option C: Chemical, heat, kinetic, electrical.