What did Charles Darwin discover as a result of his experiments with breeding pigeons?

Desirable traits can be selected for and bred in offspring.

Humans can create new species through selective breeding.

Dogs and plants can be bred the in same way as pigeons.

The pigeons had distinctive traits that were passed on to offspring.

Charles Darwin noticed that among the same species there were variations in traits based upon geographical location. These changes may have evolved from climate differences, predator/prey relationships and food sources. This particular experiment was intended to duplicate natural selection by demonstrating the concepts with artificial selection. The result was that over time, new traits could be bred for. Although there may be more than one correct answer here, the best answer is the first; desirable traits can be selected and bred in offspring.