Answer
By capillary action, the wooden peg absorbs water and swells and spills the rock.
Work Step by Step
By capillary action, the wooden peg absorbs water and swells and spills the rock.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.