Comb – 4
When the colony builds comb according to specs, as interpreted by the beekeeper,
any bar of comb can be removed for inspection.
Here you can see a circle of capped brood to the right,
and you can see how older comb darkens.
Also, note how the bees chain from each other along the bottom and along the top right.
Bees use this self-made scaffolding to build comb;
beekeepers call it festooning.