What primary food sources characterized the diet of mammoths inhabiting the cold grasslands of Beringia?
Answer
Grasses and sedges
The life cycle and sustained presence of woolly mammoths in the Beringian region were supported by the local vegetation within that environment. Beringia was characterized by cold, dry grasslands that were highly suitable for the mammoths' specific dietary needs. Therefore, their diet primarily consisted of grasses and sedges, the staple vegetation available in that expansive, ice-age grassland ecosystem.

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