The correct answer is C. Direct sunlight and rainy days.
Explanation
The map shows the latitudinal zones of the Earth, the equator, the tropics of Cancer and Capricorn, and the Antarctic and Arctic poles. Regarding the equator, it is the latitudinal area located in the center of the Earth. Its principal characteristic is that receives the sun's rays more directly, so there are no seasons. In the equatorial zone, the climate is determined by the altitude, the higher altitude has a lower temperature, and the lower altitude has a higher temperature. Precipitation is another important issue in this area because the direct incidence of the sun and the convergence of north and south winds allow the formation of clouds that produce abundant precipitation. Therefore, the correct answer is C. Direct sunlight and rainy days.