The invention of Agriculture affected human birth and death rates by lowering death rates and raising birth rates. It also affected population because it raised it.
NaF is not covalent, but ionic, as Na and F are on opposite sides of the periodic table.
The answer is nicki minaj
The answer is the bottom choice, 'witching hour, etc'. This is because these are all negative and creepy words, which help to set a very dark theme