The answer would be B. The topmost layer of the earth is the crust, which is made from rock - usually basalt and granite. The continental crust is made of solid rock, usually a mixture of the two rocks, and the oceanic crust is made mostly of hardened, once-melted basalt.
Hope this helps!
P.S. May I have brainliest, if this answer is satisfactory?
The cell membrane is said to be selectively permeable is because it allows a select few things to go through while stopping the passage of other stuff.
The epiglottis is a flap of cartilage the covers the entrance to the throat protecting the lungs from obstruction. It moves when we swallow to allow food in.
