Answer:
D. Ecological
Step-by-step explanation:
Monocular vision in animals (primarily herbivores or prey animals) allows them to see with their eyes independently, rather than acting as a pair, like humans.
This feature is evolutionary in character, allowing these animals to adapt to the conditions of their habitat and predators, giving them a broader view, allowing them to detect threats from as many directions as possible.
However, this type of visual adaptation has its limitations, for example, the depth assessment, not always allowing these animals to see with complete clarity the distance in which the threat lies.