Answer:
the correct answer is a. the importance of Indus religious ceremonies, where the bead necklaces are worn by a priest
it was common in Indus valley civilization to produce sacred and religious ornaments using beads and other small components from natural sources.
Bead necklaces were worn by priest before conducting religious ceremonies such as making offerings and sacrifices to the gods and in ceremonies where the rulers seek to get advice and guidance from the gods in their political and military activities.
the other option are incorrect and not applicable, as these do not show case specialization and pottery techniques.