The answer is B. Exfoliation joints. As shown in the figure below, exfoliation joints may form parallel to slope surfaces in granite and become a failure surface.
"Parallel" and "surfaces" are used in the question to give context, and "shown" is used to reference the accompanying figure.
As shown in the figure below, exfoliation joints (option B) may form parallel to slope surfaces in granite and become a failure surface. These joints develop due to the expansion and contraction of the rock as a result of weathering processes and can result in rock slides or slabs detaching from the main rock mass.
Learn more about rock mass here:- brainly.com/question/870434
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