Final answer:
Option (c), Dogs have higher relative levels of lymphocytes than neutrophils in their circulating blood volume.
Step-by-step explanation:
The species that has higher relative levels of lymphocytes than neutrophils in their circulating blood volume is the dog.
In the peripheral blood, lymphocytes are the predominant white blood cells. In dogs, they can range from 5,600 to 19,200 cells per µl, while neutrophils are also present but in lower levels.
Therefore, among the given options, dogs have higher relative levels of lymphocytes than neutrophils in their circulating blood volume.