Me. don't just answer for points. give me the right answer which of the the following will lead to a thunderstorm? a. dry and stable air, and a way for the surface air to rise. b. moisture, unstable air, and a way for the surface air to rise. c. moisture, unstable air, and low cloud cover d. moisture, motionless air, and a cold front

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up