Critical Thinking: A child appears healthy until approximately 9 months of age. Then the child develops severe
bacterial infections. One after another. Fortunately, the infections are successfully treated with
antibiotics. When infected with measles and other viral disease, the child recovers without
difficulty.

this is because the child's immunity system has improved and the child's immune system can fight all the know bacterias that were given through the antibiotics...

it's false.

"every person has their limitations which prevent us from accomplishing something. some are better than mathematics for example and some are worse. those people who are worse might never be able to become mathematicians, but that does not mean that they would not be great at doing something else."

the trait of personality falls in the middle of the diagram because personality is a mixture of ones nature and environment.