What phenomenon naturally warms earth's lower atmosphere and surface

Will you chech and finish these for me, because i am stumped with them.

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

Identify the type of heat transfer occurring when chocolate melts in your hand