I’ve in the Caribbean for 12 years. The answer is D.
The 90-degree angle would be hotter since this is receiving the most direct sunlight concentrated in a smaller area. In areas at the equator, the angle of incoming rays from the Sun is perpendicular (90 degrees) to the Earth's surface during all days of the year. Such areas experience warm climates throughout the year
It’s actually not any of those it’s osmotic flow of water :)
