Earth's original atmosphere probably consisted mostly of which gas?
a. oxygen
b. nitrogen
c. water vapor
d. carbon dioxide

let that person have a turn to speak : )

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )

5.6⋅10−^19  j

do you need the explaination?