Comb – 3
The smooth- and white-capped comb in the front frame holds honey.
In the back frame, to the lower left, the capped cells hold pupae.
A bee develops from an egg
to a larva (plural larvae)
to a pupa (plural pupae)
in a single cell before it emerges as an adult.
Beekeepers refer to bees in development as brood and to the nursery cells
as brood cells.
Workers cap brood cells with wax at the start of the pupal stage,
and beekeepers call these cells capped brood.
By the way, the names of the developmental stages are alphabetized,
and that happy circumstance offers a handy mnemonic to hELP you remember the sequence.
(Yes, the observation and mnemonic are my out-of-the-gate contributions to apiculture.)