In what way are cities microclimates? A. Cities are warmer than the areas immediately around them.
B. Cities have more precipitation than rural areas do.
C. Cities are smaller than the areas around them.
D. Cities have lower atmospheric pressure than rural areas do.

The answer is A.

This is because cities contain more people in one area, thus they contain more businesses like restaurants, cafes, etc. that produce more overall exhaust than say a more rural town with fewer people. Light pollution will also be largely greater over a city as opposed to a rural town.

radiative zone

explanation    

radiative zone is the layer of the sun which energy is transferred away from the core by radiation. although, the core is the only part of the sun that produces an appreciable amount of heat through fusion. in fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius.