Which anatomical features of the vicuña work together to provide an early warning system against predators?
Answer
Large expressive eyes and large, erect, pointed ears
The vicuña possesses large, dark eyes positioned on the sides of its head, providing a wide field of vision to scan the expansive plains. This is complemented by large, erect, and pointed ears that constantly swivel to detect faint sounds, together creating an efficient sensory apparatus for identifying potential threats.

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