Janice, who is 55 years old, needs to get three projects done by the end of the week at work. when she was younger, she would have worked on all three projects more or less at the same time. now that she is older, however, janice needs to work on one project at a time. janice's current inability to multitask is due to changes in her

Brain

Explanation:

The brain is an important part of the body of a person. The brain is the largest and complex part of the human body. The human brain is made up of many neurons that communicate through the synapse. The above statement indicated that Janice when she was young engaged in many tasks at one time.

But now she is old around 55 years old, due to the aging effect she reduced her attention and concentration. She reduced her memory. Due to the aging effect, she is not able to concentrate on multiple tasks at one time. Thus when she was young she was able to concentrate on many tasks but in her older age, she is not able because of the aging effect.

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