"I have seen great surprise expressed in horticultural works at the wonderful skill of gardeners, in having produced such splendid results from such poor materials; but the art
has been simple, and as far as the final result is concerned, has been followed almost
unconsciously. It has consisted in always cultivating the best-known variety, sowing its
seeds, and, when a slightly better variety chanced to appear, selecting it, and so onwards."
--Charles Darwin, Origin of Species, 1859
The excerpt describes which of the following advances in food production?
Cultivation
Pastoralism
Plowing soils
O Foraging