In Which Sequence Does the Form of Energy Change as a Person

In which sequence does the form of energy change as a person sees a friend and waves hello?

A) Light $\rightarrow$ electrical $\rightarrow$ mechanical $\rightarrow$ chemical
B) Mechanical $\rightarrow$ electrical $\rightarrow$ chemical $\rightarrow$ light
C) Light $\rightarrow$ chemical $\rightarrow$ electrical $\rightarrow$ mechanical
D) Light $\rightarrow$ mechanical $\rightarrow$ chemical $\rightarrow$ electrical
E) Electrical $\rightarrow$ mechanical $\rightarrow$ light $\rightarrow$ chemical