Read the following passage: the movement of tectonic plates buries a rock deep inside earth. intense heat and pressure change the mineral composition of the rock and transform it into rock a. rock a melts and comes out to the surface of earth during a volcanic eruption. the molten rock cools rapidly to form rock b. which statement is most likely correct? rock b may have fossils. rock a may have shiny, glassy surface. rock a is composed of layers of sediments. rock b has a fine grainy texture and small crystals.