How is thermal energy distributed in most heating systems? A.
convection

B.
conduction

C.
radiation

I think B

Explanation: Thermal conduction is the transfer of internal energy by microscopic collisions of particles and movement of electrons within a body. The colliding particles, which include molecules, atoms and electrons, transfer disorganized microscopic kinetic and potential energy, jointly known as internal energy.

explanation:

i think option no d is the correct answer

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.