What process does the female perform after provisioning the brood cell with pollen and nectar before sealing it?

Answer

Laying a single egg on top of the food source

The female Wool Carder Bee exhibits a precise sequence for completing each individual thimble-sized brood cell she constructs within her chosen nesting cavity. After gathering the necessary plant fibers to create the soft, insulating lining, she provisions the cell by packing it with a mixture composed of collected pollen and nectar, which will serve as food for the developing larva. Once this food mass is prepared, the female deposits a single egg directly onto the surface of the provisions. Only after laying this solitary egg does she seal the cell completely, using more plant material or sometimes small pebbles to plug the opening, before moving on to construct the next cell.

What process does the female perform after provisioning the brood cell with pollen and nectar before sealing it?
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