What does impairment mean? A a special talent or ability
B an injury or weakness
C the desire to overcome a flaw
D resistance to disease

B) an injury or weakness

Explanation:

Impairment means when something can not work or function correctly, especially if you are reffering to the organs in the human body. For example, certain dieaseses can cause cardiac arrest. Then, the organ that gets targeted might have chances of becoming impaired.

recent brain research has shown some surprising benefits as a result of formal musical training. learning to play a musical instrument appears to develop parts of the brain that can even influence academic results. the studies indicate that the earlier a child begins training, the more benefits there are. one such study showed that children who began musical studies before the age of seven had a more developed brain in the region where language production and auditory processing take place. scientists believe there is mounting evidence to show that early musical training can improve brain function.

explanation:

a. they have shared matter.