Answer:
the pressure is increase and so minerals start melting
(a) it suddenly causes the melting point to decrease as a result minerals melt at low temperature
(b) and by adding water we can lower the melting point of the rock
Step-by-step explanation:
pressure influence rocks melting points at depth as when we go inside the depth of earth crust
the pressure is increase and so minerals start melting
and
Water to do the melting point of rocks are following
(1) it suddenly causes the melting point to decrease as a result minerals melt at low temperature
(2) and by adding water we can lower the melting point of the rock