Plucking is the process of erosion which happens when there's glaciation.
During the movement of ice and glaciers, the surrounding rock is scraped which brings about erosion.
Plucking occurs due to the fact that the stones and rocks are frozen which results in a jagged landscape which brings about erosion.
It should be noted that the rocks dragged by glaciers fo not produce grooves and scratches in bedrock as stated in the question. Therefore the correct option is False.
