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Which of the following represents an idea that Darwin learned from the writings of Thomas Malthus?
Igneous Rocks
Stones created by the process of magma or lava cooling and turning into solid form.
Sandstone
A sedimentary rock composed mainly of sand-sized mineral particles or rock fragments, commonly used in building and construction.
Shale
A fine-grained sedimentary rock formed from clay and other minerals, often used in the production of oil and natural gas through fracking.
Conglomerate
A sedimentary rock made up of rounded pebbles, cobbles, and boulders cemented together.
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