Energy to thermal energy.
a hair dryer converts
a kinetic
b potential
c electrical
d work

A hair dryer converts "electrical energy" to "thermal energy".

Option: C

Explanation:

The "electricity" is converted to "heat energy" in a "wire coil". Here electricity process "air" out of "the hair dryer" with the help of forced convection. Most hairdryers use a nichrome wire coil that will not oxidize when heated and allowing it to "blow" the hair dry with high temperature air which speeds up evaporation. Thus "wire heats" the "air faster", in most of the "hair dryers" the "air" is only in "the barrel" for "half of a second".