Some major factors used to determine the differences between sunset desert climate zones are

Answer;

Geography

Amounts of rainfall

Maximum summer and minimum winter

temperatures

Light intensity

Explanation;

-Sunset's Climate Zones are based on winter minimum temperatures, but also include other factors such as summer high temperatures, length of growing season, humidity, and rainfall. This approach is used to avoid the difficulties encountered when the USDA Hardiness Zones are applied to parts of the western U.S.

i think the answer is b.

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