Question

multiple - choice question
how are we able to use cellulose and lignin to our advantage?
heat (fire) to warm ourselves from the outside
heat (fire) to warm ourselves from the inside
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Explanation:

Cellulose and lignin are components of plant - based materials. We can burn plant - derived materials containing them to produce heat for external warming. Heat from fire warms the environment around us, not our internal body directly.

Answer:

A. heat (fire) to warm ourselves from the outside