Th answer you are looking for is physical weathering
4) Polaris
Stars emit light with energy generated by nuclear fusion, think of the Sun as an example. Polaris is a star, it's the brightest star in the little bear constellation, and therefore the correct answer.
Sedimentary rock is the rock from which soil forms.
Meld into one nation diverse groups who are peaceful within her borders and have a broader loyalty to the country than the group they belong to. In Canada, (where I live) I like to think that the hatred shown between Muslims and Christians, Hindus and both, Jews and Arabs, is an imported emotion. It's not true of course. We're just much quieter about it.