Cortical thickening in five- to 11-year-olds in the may reflect improvements in language abilities, such as in reading.

Frontal and temporal lobe areas.

Explanation:

Brain is one of the most important organ of the body as it regulates all the body coordination and also controls the other system of the body. Human brain is divided into fore brain, mid brain and hind brain.

The cortical region of the brain gets thicken at the 5- 11 years old especially the frontal and temporal lobe areas. These areas of brain are involved in the language abilities, thinking, reading and writing. The thickening of the frontal and temporal lobe improves the reading ability of the 5-11 years old children.

Thus, the answer is frontal and temporal lobe.

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