Darwin made which observation while on his four-year voyage on the HMS Beagle?

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Darwin observed that organisms are varied and some variations are inherited. This observation was a crucial foundation for his theory of natural selection, which explains how favorable variations in a population can lead to evolutionary changes over time. Although Darwin did make other important observations during his voyage on the HMS Beagle, such as the fact that more individuals of a population are born than can survive to reproduce, it was his observation about inherited variation that had the most profound impact on his thinking about evolution.

Darwin Made Which Observation While on His Four-Year Voyage on the HMS