I believe Cortex is the last structure of the brain to complete its growth process. Surrounding the brain is the Cerebral cortex which resembles a half shelled walnut, it is the largest, most complex brain structure which accounts for 85% of the brain's weight, containing the greatest number of neurons and synapses, and responsible for the unique intelligence. It is the last brain structure to stop growing, it is sensitive to environmental influences for a much longer period than any other part of the brain.
I think it's B., calcite.
Not sure though.
Hope this helps,
-Tiara
Electrical products
Explanation - Polymers of electrical products can be produced in large quantities and low cost. This type of polymer are non-conductive in nature. However, they very high heat resistance property. Polymers for electrical products can mold itself in various shapes and sizes and also can reach very minute areas.
Polymers vary from one item to another. Polymers for commercial packaging is different from polymers of electrical products. Thus, polymers need to be chosen properly according to the use and its effectiveness.
