Male widow birds can have short, medium, or long tails. However, females are attracted to widow bird with longer tails. The problem is that longer tails make it harder for the male widow bird to fly and avoid predators. A group of explorers capture a group of widow birds and relocate them to another island. This island also has many resources but has many predators. Which graph below represents the expected allele frequencies of the widow birds tails after several decades? Explain your answer.