Sanjay inferred that a train was approaching rapidly based on the way the noise from the train sounded. which skill is sanjay using

The skill that Sanjay is using is the time – space relationships. This skill had helped Sanjay into determining that a train is about to pass by or is about to approached base on the way that he had observed through the noise that he had heard. In which made him think whether if the noise is loud, it may approach rapidly.

the rest of the

no the answer is c only objects touching the earth's surface can be acted upon by an outside force