Question

Which of the following statements is true?

A) cool air is less dense than warm air.
B) Sound does not require a medium for travel.
C) Magnetism is caused by the spinning motion of electrons.
D) Electricity flows from positive to negative areas.

Answer 1

Magnetism is caused by the spinning motion of electrons. is true :)

Step-by-step explanation:

Answer 2

The statement that is true is C.