I think the answer is color.
Land surfaces absorb much more solar radiation than water. Water reflects most solar radiation that reaches its surface back to the atmosphere. Since land absorbs more solar radiation the land surface retains more heat as do the vegetation for energy. Thus, land surfaces warm more quickly than water.
And: Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special transport proteins. Some molecules and ions such as glucose, sodium ions, and chloride ions are unable to pass through the phospholipid bilayer of cell membranes.
<em>An area where the largest coral reefs flourish would be;</em>
B.) Indian Ocean
<u>Only the Indian Ocean lies within the required latitudes. Coral reefs form in latitudes within 30 deg of equator.</u>