Answer:
B.
Explanation:
The up and down movement of gases and liquids caused by heat transfer is convection.
-2 cuz 20 negative minus 18 positive is -2
Downbursts are damaging winds<span> localized in an area which are caused by air that flows downward rapidly out from a thunderstorm. They can cause severe damage to infrastructures and can cause casualties when not prepared. This becomes worse as these types penetrate in areas near the ground. </span>
