Ask for advice on geographical topics …

1, a summer solstice b autumnal equinox c winter solstice d vernal equinox

2. Point C turns fastest, because it is winter in the northern hemisphere, and the earth is closer to the sun (according to Kepler formula in physics, it is closer to the focus and faster).

3. The Tropic of Cancer and the area north of the Tropic of Cancer

4, counterclockwise

5. Winter solstice (65438+February 22nd), autumnal equinox (September 23rd), winter solstice (65438+February 22nd), c

(By the way, there was a misunderstanding upstairs)