The one factor that contributes to the formation of polar, temperate, and tropical zones is the angle of the Sun's rays. Thus, option "A" is correct.
What is the climatic condition of tropical zones?
The climate on Earth can be divided into three major zones, tropical, temperate, and polar.
The tropical ones are at the Equator and near to it, the temperate ones are at the mid-latitudes, and the polar ones are at the higher latitudes.
This is a result of numerous factors, such as the shape of our planet, as the sunlight falls at different angles at different parts of it, so some parts get much more heat, while some much less.
Thus, option "A" is correct.
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