Tropical and polar climate zones are very distinct. This is because _____.
Athe Sun's rays are more concentrated near the equator
Bthe Sun's rays are more concentrated near the poles
Cthe poles absorb sunlight more effectively
Dclouds reflect more sunlight at the equator
Athe Sun's rays are more concentrated near the equator
Bthe Sun's rays are more concentrated near the poles
Cthe poles absorb sunlight more effectively
Dclouds reflect more sunlight at the equator