Does anyone know what this question means? Because I don't understand it. State what happens to the mass of copper sulphate that can dissolve when the temperature increases.
Please help

It says that what happens to the mass of copper sulphate which is already dissolved in any kind of solution when the temperature increases.

the answer is:

carbon dioxide

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.