Answer : (D) topography
Explanation :
Nick lives in an area that has a south-facing slope. The temperature in his area is always high. This implies that Nick's place gets maximum sun rays.
Abiotic factors are the things or the conditions which affect our ecosystem or organisms in it.
Topography means the full description of any place. It is the study of the properties of land surfaces. So, the topography is responsible for high temperatures in Nick’s area
Out of the given options, correct one is (D) "topography".