Concept:The equatorial climate receives steady sunshine throughout the year, so its monthly temperatures remain almost the same and its annual temperature range is the smallest among the listed climatic types.
Explanation:The annual range of temperature is calculated as the difference between the average temperature of the hottest month and that of the coldest month.
Places on the equator get strong, direct rays of the Sun throughout the year, giving them a warm, wet climate with no distinct summer or winter.
Because every month records nearly the same high temperature, roughly between
26∘C and
27∘C, the annual range of temperature remains only about
2∘C to
3∘C.
A tropical desert, by contrast, has scorching hot summers, cooler winters, and a very wide daily variation of temperature.
Cool temperate and warm temperate climates also experience clearly different seasons, so their hottest and coldest months differ by a much larger margin.
Thus, the equatorial climatic type has the smallest annual range of temperature.
Answer:D. Equatorial