Question

if the tilt of the earths rotation axis becomes than it is today, for example changing from 23.5° to 22.1°, then compared to today, future winters would be a warmer b the same temperature c cooler

Explanation:

The tilt of the Earth's axis affects the seasons. A smaller tilt (like from 23.5° to 22.1°) means less extreme differences between seasons. Winters would receive less intense sunlight (since the angle is more "direct" in a sense of spreading out less, but overall with the smaller tilt, the contrast between summer and winter is reduced and winters get relatively less of a "lean" towards or away from the sun in an extreme way compared to a larger tilt. So winters would be warmer as the temperature differences between seasons are less stark.

Answer:

A. warmer