Final answer:
The shared feature among camels, Quasimodo, and certain whales like the Australian humpback dolphin is a humpback or hunch, with each having its specific causes and functions.
Step-by-step explanation:
The feature shared by camels, Quasimodo (a fictional character from Victor Hugo's novel 'The Hunchback of Notre-Dame'), and certain whales, such as the Australian humpback dolphin, is a humpback or a hunch. While camels are known for their distinctive back humps used for storing fat, Quasimodo is characterized by his hunched back due to a severe spinal deformity. Certain whales, such as the humpback whale and the Australian humpback dolphin, are also known for their curved backs, which give them their name. These humps and curved backs are discernible morphological features, although the specific causes and functions vary among these animals.