The eye’s "blind spot" is related to:
1. light rays focusing too far in front of the retina
2. light rays focusing too far behind the retina.
3. a cluster of cells around the fovea which contains cones, but no rods.
4. an area without receptor cells where the optic nerve leaves the eye.

Option 4) an area without receptor cells where the optic nerve leaves the eye.

Explanation:

The blind spot is found on the retina. It is the point where the cells are not sensitive to light due to the optic nerve leaving the eye to the brain.

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

bacterium is not correct