In the rainforest, there are deep and shallow flowers. Hummingbirds with short beaks are able to get nectar out of the shallow flowers, while hummingbirds with long beaks are able to get nectar from the deep flowers. Hummingbirds
with medium beaks struggle to get food from either flower and as a result, die earlier. What kind of selection is acting on beak length in humminbird
a . stabilizing selection
b . directional selection
c . disruptive selection