As the particles of a solid undergo sublimation, they
a) lose energy
b)move closer to one another
c) change temperature
d)move farther apart from one another

The modern-day generator works on the principle of electromagnetic induction discovered by michael faraday in 1831-32. faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field.

The force that opposes gravity for falling objects is  air resistance.  (d)