scientific term for tending to be up and about during the hours when the sun is up. Being awake in daytime has some obvious advantages: It's warm, it's easy to see, and, at least for humans, sunshine provides much needed vitamin D and also makes us feel good. But for many animals, being up at night, or being nocturnal, is a great arrangement. Small animals who are in danger from predators can gather food more safely in the dark. And some animals can find their way around by using senses other than sight -bate, for example, use their sense of hearing to navigate. In hot climates, it can also be a good thing to avoid the bright sun and spend the day curled up in a cozy cave or den. Which statement best summarizes two central ideas of the text? A. Humans are diurnal, bats are nocturnal B. Some animals are adapted to being diurnal, other animals use senses other than sight