Concept:The eye is protected by an outer fibrous layer that is tough and white.
Explanation:The eyeball is covered by a strong, white, tough outer membrane.
This membrane is called the sclerotic coat, also known as the sclera.
It encloses and protects the inner structures of the eye.
At the front of the eye, the sclerotic coat becomes modified into the transparent cornea.
This transparent part allows light to enter the eyeball.
The other options do not describe the white outer covering of the eyeball.
Answer:A. Sclerotic