The heat causes contact metamorphism. The correct option among all the options that are given in the question is the first option or option "A". Contact metamorphism is the type of metamorphism that is caused due to proximity or contact with an igneous intrusion. I hope the answer has helped you.
This kind of metamorphism changes the rock minerals and texture
are changed because of heat and its contact to magma. The magma forces its way
up to the vent and baking the rocks until it changes.
The earliest of civilizations were based around river valleys. This allowed them to irrigate fresh water to their crops allowing for better farming and therefore, bigger and better civilizations.
