In science, an idea proposed as a possible explanation for something is called a(n) a. experiment b. theory c. law d. hypothesis e. assumption

D. Hypothesis.

Explanation:

A hypothesis is defined as an idea or explanation which can be further tested through study and experiments. It is a proposed explanation for a phenomenon.

Scientists generally base scientific hypotheses on previous observations that cannot be explained with the available scientific theories.

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.