S. What happens
the heat
from
the heat source?

Radiation happens when heat move as energy wave called infrared wave directly from its source to something else .

Well what happens is radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else. this is how the heat from the sun gets to earth. in fact, all hot things radiate heat to cooler things. when the heat waves hits the cooler thing,they make the molecule of the cooler object speed up. hopefully this is the correct answer

The correct answer would be b) volume versus temperature, because they are also directly proportional.