Igneous rock can to form metamorphic rock a)melt b)harden c)heat up d)weather

Heat & Pressure ( So I guess in this answer choices it's " Heat up" )

The reason it's not " melt " because if melting were to take place then that would make Magma, and magma isn't metamorphic rock.

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

here is your answer hope i .

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.