"what non-native species reached plague proportions but were finally brought under control after the purposeful introduction of a disease that only affected this species? "

the wires in the toaster turning red and the toast crisping and turning brown

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.