What phenomenon is responsible for hot spots a. mantle plumes b. pyroclastic flow c. ridge push subduction

The phenomenon is responsible for hot spots is Mantle Plumes.

Explanation:

Volcanic activity that is completely unrelated to the plate movements or boundaries and takes place within the tectonic plates is termed as hotspot volcanism. Mantle plumes are basically the lighter and warmer mass inside the mantle that comes up as a result of the process of convection.

It has a head like a bulb followed by a long tail. When the head reaches the lithosphere, it spreads out like a mushroom. During this process, the pressure drops down while the temperature stays constant resulting in decompression melting of the mantle, producing huge amounts of magma.

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;