Which thing is an example of smooth texture?

Correct answer: Glass

Smooth texture describes an even surface with few or no noticeable grains, ridges, or bumps. Glass is manufactured with a relatively uniform surface, so the hand can usually move across it easily and it is a common example of smooth texture. Sand, brick, and tree bark generally contain loose grains, pores, or raised irregularities, making them rough or uneven. Therefore, glass is correct.