Final answer:
The term that describes the chameleon's tongue action is 'extension', referring to its ability to stretch outward to capture prey. The correct option is D.
Step-by-step explanation:
The question refers to the remarkable ability of a chameleon's tongue to rapidly protrude to capture prey, which is a trait closely associated with its biology and natural adaptations. Chameleons have evolved specialized tongues that can stretch out quickly to catch insects and other small animals, sometimes reaching lengths comparable to or exceeding their body length.
This specialized hunting mechanism is an extension of their body, allowing them to secure food effectively while remaining stationary, thus avoiding detection by predators and prey alike.
Among the options provided (hypertrophy, protrusion, elongation, extension), the term that best describes the chameleon's tongue action is extension, because it pertains to the ability of an anatomical structure to stretch or extend outward.