In this excerpt from civil disobedience by henry david thoreau’s why does thoreau’s compare american government to a wooden gun

Determine the meaning of the word *propel* using the context clues in the sentence. wind power is the ability to capture the wind in a way to *propel* the blades of wind turbines. a) to move slowly b) to urge onward c) to stop from moving d) to drive, or cause to move, forward