Examine the data presented and find the statement that represents an inference or something rather than observation

The correct option is D: The blemishes are cyclic in their appearance and disappearance.

Explanation:

The rest of the options given state an observation, as opposed to an inference, regarding the data on the chart. An observation is something you can just read off from the chart/given data, whereas an inference would be something you conclude based on what is being presented in front of you.

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.