What does the material say about brain redundancy?

• A. Any brain damage leads to deficits immediately
• B. The brain has redundancy; people can lose whole hemispheres and still function relatively normally
• C. There is no redundancy; every area is unique
• D. Redundancy exists only in memory centers

Answer: (B)

The idea being tested is the brain’s redundancy and its ability to adapt after damage. The material emphasizes that the brain isn’t a collection of isolated, indivisible modules; it has overlapping networks and neural plasticity that allow other regions to take over functions when one part is damaged. This is especially evident in development, when the brain is more malleable. Because of this redundancy, losing an entire hemisphere can still leave a person functioning relatively normally, as the remaining tissue reorganizes and supports essential skills such as language, movement, and problem solving.

That’s why this option best captures how the brain works: there is redundancy, and the nervous system can compensate for substantial tissue loss through reorganization and adaptation. In contrast, the other ideas—that any brain damage produces immediate deficits, that there is no redundancy with every area being unique, or that redundancy exists only in memory centers—don’t fit what the evidence shows about neural plasticity and functional recovery across many domains.