if stretched out flat, the human cerebral cortex would cover an area of about in addition, the average 20 year old has about miles of white matter in his or her brain.

About 2.7 Square feet, 100 miles

Explanation:

The human cortex is an outer layer that is covering the grey matter over the hemisphere and is typical 2-4  mm thick and certain regions have a similar function and are termed as the primary cortices and are responsible for receiving the sensory inputs ad thus have more complex fictions and are also involved n the synthesis of movements.

Answermaritime tropical;

Answer they are produced by collision of tectonic plates;