8) A blind spot in the retina occurs where A) the fovea is located. B) rod cells are clustered to form the macula. C) the optic nerve leaves the eye. D) amacrine cells are located. E) ganglion cells synapse with bipolar cells.

option c

Explanation:

A natural blind spot also called the optic disc in the eyes occurs where the blood vessels and axons of the ganglion cells leave to form the optic nerve. it is so called because there are no receptors (rods and cones) in this part of the retina. Artificial blind spots can also be formed when something prevents light from getting to the photoreceptors which are the rods and the cones.

"a.) well–developed vascular system."

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.