What is a significant characteristic of rats concerning their senses?

Rats are known for their exceptionally keen sense of smell, which is significant for their survival and various behaviors, such as foraging and social interactions. This heightened olfactory ability allows them to detect food, predators, and even communicate through scent markers. Their sense of smell plays a crucial role in their navigation and ability to find things in their environment.

The other options do not accurately represent the characteristics of rats. For example, while rats do have taste capabilities, it is their sense of smell that is particularly notable. Additionally, their vision is not as developed as their olfactory sense, meaning they do not possess very keen sight. Lastly, stating that they lack a sense of smell is fundamentally incorrect, as this sense is one of their most developed abilities.