Final answer:
The sclera and cornea are part of the outer, fibrous layer of the eyeball. The sclera makes up most of the eye's surface, and the transparent cornea allows light to enter the eye. The choroid and pupil are not part of this layer.
Step-by-step explanation:
The structures that are part of the outer, fibrous layer of the eyeball include the sclera and the cornea. The sclera, often referred to as the "white of the eye," accounts for five-sixths of the eyeball's surface and is composed primarily of connective tissue. The cornea, on the other hand, is the transparent part of the fibrous tunic that covers the anterior tip of the eye, allowing light to enter. Both the sclera and cornea are key components of the eye's fibrous tunic, which represents the protective outer layer. The choroid and pupil, meanwhile, are not part of this outer layer; instead, the choroid belongs to the vascular tunic, and the pupil is an opening within the iris which is part of the vascular tunic as well.