Aspot in the middle of the retina that only contains cones is called the
a. cornea
b. optic nerve
c. fovea
d. optic disk

A spot in the middle of the retina that only contains cones is called the fovea. The correct option in regards to the given question is option "c". The word fovea has been derived from a latin word. Fovea or fovea centralis is the part of the eye where a depression or a small pit that contains numerous cones that are very closely packed. This is the part that is responsible for providing a very sharp centralized vision. It is highly important for all human beings since this part helps humans to read and drive. Most of the optic nerves that are present carry information's from the fovea.

The particles of the gas inside the ball heats up, bouncing off each other and spreading farther apart.hope my answer has you : )