Hydrocephalus is characterized by which of the following?

The correct answer is characterized by sizeable eyes. Hydrocephalus involves an accumulation of cerebrospinal fluid within the ventricles of the brain, which leads to increased pressure and subsequent enlargement of the skull. This condition can cause the eyes to appear enlarged or bulging due to the pressure and changes in the cranial structure. Therefore, the enlarged appearance of the eyes is a direct consequence of the fluid buildup and the resulting effects on the surrounding structures.

While the other options may describe certain physical traits related to various conditions or congenital malformations, they do not align with the specific characteristics associated with hydrocephalus. For instance, cleft palate pertains to a condition where there is an opening or gap in the roof of the mouth, which is unrelated to hydrocephalus. Cloven and shouldered hooves are terms connected to specific anatomical features in certain animals but do not relate to the neurological implications and symptoms observed in hydrocephalus.