Which of the following shows natural selection? Select one: a. Pigs are bred to produce more meat. Mothers care for their young. b. Corn is planted every year. Large ears of corn are kept to plant the next crop. c. Sparrows tend to choose mates that eat similar sized seeds. Their offspring tend to also favor the same sized seeds as their parents.” d. A dog's parents were racers. The fastest dogs are bred to make the fastest puppies. PLZ HELP NOW