What are the solar terms in the northern and southern hemispheres?

The constant rotation of the earth around the sun is called the revolution of the earth. The direction of the revolution is from west to east, and the cycle is one year. When the earth revolves around the sun, the direct sunlight point moves regularly between the tropic of cancer in a year. When the sun shines directly on the equator, it is the vernal equinox or autumnal equinox in the northern hemisphere, which is divided equally between day and night.

Therefore, choose: B.