In a process called plucking, the rocks dragged by glaciers produce grooves and scratches in bedrock.

Answer : False.

Explanation : The process of plucking occurs when rocks and stones become frozen to the base or sides of the glacier which are plucked from the ground or rock face as the glacier moves from there.

Which leaves behind a jagged landscape. Many abrasions are observed when the rocks and stones become embedded in the base and on the sides of the glacier. So, the statement that process of plucking includes the rocks that is dragged by glaciers produce grooves and scratches in the bedrock is completely false.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

a is the correct answer