Senior three is a geography multiple-choice question, and the college entrance examination is urgent tomorrow! !

The solar terms in the painting are vernal equinox and Qingming, which are both in the spring half year (that is, the winter solstice → the summer solstice) and in the summer half year!

During this time, the direct point of the sun has crossed the equator and headed for the Tropic of Cancer, so there is no problem to shorten the day in the southern hemisphere, so C is correct.

The rainy season in the North China Plain is at least after the summer solstice, near the summer solar terms, so a is of course wrong, and there is a spring drought in North China at this time.

After the vernal equinox, the sun has crossed the equator and moved to the tropic of cancer, so in the northern hemisphere near the equator, the noon sun height angle tends to be smaller, and B is wrong.

During the summer solstice, the earth is farthest from the sun. According to the conservation of energy in physics, the potential energy of the earth relative to the sun is the largest, while the kinetic energy is the smallest, that is, the revolution speed tends to slow down, and it is the slowest near the summer solstice.

To sum up, only C is correct.