Describe membrane permeability for ions and glucose

Only small, uncharged molecules (like 02 for example) can go in or out of the cell by simple diffusion.

Since glucose is a relatively large molecule and ions (like Na+, Cl-) have an electric charge, they are unable to diffuse into or out of the cell.
However, since ions, glucose and other big or charged molecules are necessary for the functioning of the cell, there are special means of transport for them.
Integrated into the cell wall there are membrane proteins which serve as canals for transporting specific molecules like ions, glucose, etc.

Option B, Lava melts u rlying rocks, which crystallize into new minerals.

Explanation:

Metamorphic rocks are the formed when the alternating heat and pressure are applied on an existing sedimentary or igneous rock. In the first step, a rock is forced down to reach the level of mantle where it experiences high temperature and pressure due to which it recrystallizes. Along with temperature and pressure, physical processes such as tectonic plate shifting and compression forces with in the rocks also compresses the rock into smaller volumes thereby making it more compact and dense. Therefore, all metamorphic rocks are denser than their original parent rock.  

Hence, the second step is option B