Jag behöver hjälp fattar väldigt lite. Tack

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Ab c or d ? i’m not sure what the answer is