Answer: Volcanic materials ultimately break down and weather to form some of the most fertile soils on Earth, cultivation of which has produced abundant food and fostered civilizations. The internal heat associated with young volcanic systems has been harnessed to produce geothermal energy
Explanation:
That would be the Thymus Gland.
Their skin is thin so they're prone to drying out and they cannot hold moisture in their bodies(Waterproof skin)
