Answer:
D. Urban cities is a correct answer.
Step-by-step explanation:
Urban cities have the highest average temperatures because of urban heat island effect makes the air temperature warmer.
An increase in the population and more land usage,modification in the land, decrease in the evaporation directs to expand the area and increase the average temperature which result in the increasing urban heat islands. The urban heat island is an aspect in which the surface temperature gets concentrated in the urban areas and the heat gets stored in the surface of the materials and solar energy gets absorbed and solar radiation is produced, which warmer the air and the higher heat islands increase the average heat temperature in the urban cities.
Thus the Urban cities has the highest average temperature.