Question

how did farmers observed by charles darwin take advantage of natural variation to improve their livestock?

Answer 1

I never even knew they did that whoa that's cool though
They determine the traits they wanted in their animals. They then took the animals that exhibited those traits and then bred for them. They, for example, would decide that they like the strength a horse would have. They would then breed it to a horse with the same trait ans so. This trait would then be bred down the family line.