If a thermal conductor is exposed to a source of heat then that conductor may become hot.
Radiant heat is the way the sun heats the planet.
If a thermal conductor is exposed to the sun then that conductor may become hot.
What can cause a thermal conductor to become hot?
a. exposure to ice
b. exposure to a freezer
c. Evaporation
d. exposure to the sun
e. exposure to metal
f. electricity
g. flow of electrons
h. Electrical energy