In terms of the theory of natural selection, which explains why giraffes have come to have such long necks? O Stretching to get food in high trees made their necks longer, and this trait was passed to offspring Giraffes prefer other giraffes that have long necks as their mates. O Giraffe food contains hormones that cause their vertebrae to lengthen. O Giraffes born with the longest necks stayed alive when food was scarce and passed this trait on to their offspring,​