<span>A fast-flowing river of air that forms when two air masses of very different temperatures meet is called a jet stream :)</span>
I think it’s c but I’m not entirely sure
Answer:
Deep within the Earth it is so hot that some rocks slowly melt and become a thick flowing substance called magma. Since it is lighter than the solid rock around it, magma rises and collects in magma chambers. Eventually, some of the magma pushes through vents and fissures to the Earth's surface
Explanation:
USGSwww.usgs.gov
