For example, the question is why the sun is shaped like a figure in the sky instead of a straight line. I hope it can be more specific. . .

This is the difference between apparent solar time and average solar time (it is eight characters, not a straight line from north to south). To put it bluntly, 12 noon is not the time when the sun is due south, and the maximum error can reach half an hour.

The difference between them lies in the non-uniformity of the sun's projection speed on the equator. There are two main reasons: 1. The existence of the intersection angle between yellow and red. 2. Uneven revolution of the earth.

The answer to the second question is A, which is one-sided from this perspective. Perhaps the teacher's understanding is the north-south change of the sun's trajectory, rather than the gap between the peaceful sun and the sun.