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Darwin and Wallace's understanding of limited resources came from reading economist:

AJohn Keynes
BThomas Malthus
CAdam Smith
DDavid Ricardo
Answer & Solution
Correct answer: B. Thomas Malthus
1. Malthus wrote about human populations. 2. Reproduction outstrips resources. 3. This drives competition each generation. _Source: OpenStax Biology 2e, Chapter 18, Evolution and the Origin of Species (CC BY 4.0)._
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