Which best compares radiation and conduction? Both transfer thermal energy from warm objects to cooler objects.
Both can transfer energy through empty space.
Both transfer thermal energy by electromagnetic waves.
Both involve the transfer of energy through direct contact.

Both transfer thermal energy from warm objects to cooler objects.

Explanation:

Radiation involves the transfer of energy in the form of light, heat and electromagnetic waves such as x-rays while conduction involves the transfer of energy through direct contact of the two substances. The both of them involve involve the transfer of thermal energy from hotter objects to colder objects.

Radiation is involved in the transfer of energy through empty spaces while conduction involves transfer of energy through direct contact.

the answer is

c. parental