A volcano sends lava exploding into the air, creating extrusive ingenious rocks. Is this a fast or slow change?

It really depends on the location. If its underneath the earth and the magma will take a while to cool but if on surface, it should cool in a matter of days to weeks. In this situation yes because its going in the air and is gonna land on the ground which will cool pretty quickly.

c

explanation:

i think

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.