Which feature characterizes terrestrial quadrupeds?

The feature that characterizes terrestrial quadrupeds is the presence of short tails and short digits. This adaptation is significant for their mobility and stability on land. Short tails in terrestrial quadrupeds often help to maintain balance during quick movements and provide minimal drag when navigating through their environments. Short digits are advantageous for running and walking, as they allow for greater ground contact and stability in diverse terrains.

In contrast, other options present features that do not align with typical adaptations for life on land. Longer tails might be beneficial for balance in arboreal animals, long digits could assist in grasping branches, and a narrow skeleton with long fingers suggests adaptations for climbing or grasping rather than for effective terrestrial locomotion. Thus, the characteristics of short tails and short digits are well-suited to the physical demands faced by terrestrial quadrupeds, aiding in their efficiency and movement across various terrestrial habitats.