The answer is b
hope it helps
The answer is; D
The porous rock is able to absorb water from precipitation. The water resides in the pores of the rock. The impermeable rock later, which does not allow water to pass through it, allows more water to hold in the porous rock and making the local water table to rise. The water in the porous rock, therefore, can be accessed through wells or a water spring can develop.
It helps with the optic nerve, if you give me options i can help answer. Sorry if I didnt help :)
The answer to this question is :
D. Obstacle Evaluation