The answer is: [D]: "adapting to droughts and few sources of water" .
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A volcano with an empty magma chamber would be called a caldera
Explanation: During certain types of explosive eruptions, a volcano's magma chamber may empty enough for an area above it to subside, forming a type of larger depression known as a caldera.
Argon
Water Vapor
Carbon Dioxide
methane
Back country settlers distrusted him.
