What inventions resulted from the expansion of coal mining?

cruel, heartless

explanation:

polisit can also mean a body of citizens. in modern historiography, polis is normally used to indicate the ancient greek city-states, like classical athens and its contemporaries, and thus is often translated as "city-state". the body of citizens came to be the most important meaning of the term polis in ancient greece.

(d) he had been a leader of the sons of liberty.

i think economic depression and disrupted trade and commerce