What is the main ecological function provided by the dense, fibrous lining in the carder bee's brood cells?

Answer

Insulation from temperature fluctuations and maintenance of humidity

The collected hairs are molded into a dense lining which serves multiple purposes: insulating the developing pupa from temperature changes, acting as a cushion, and helping to maintain necessary humidity for metamorphosis.

What is the main ecological function provided by the dense, fibrous lining in the carder bee's brood cells?
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