1) Charles Wallace recognizes the stranger who comes into the kitchen as Mrs. Whatsit. Do you think it was just by chance she came to
the Murry house, or does she have some purpose for being there?
Explain your answer.

Of course she had a purpose. She was more like an entity instead of human. She was there because she knew that Charles Wallace's dad was stuck somewhere in their universe when he was sending S.O.S's out for help.

faulty parallelism is a grammar construction where there is no balance in the parts of a sentence they have a similar meaning but the grammar structure is not equivalent.

the correct version of this faulty parallelism in the sentence is:

jefferson wrote the declaration of independence, and he was the nation's third president.

the problem with the first version is that the sentence:

"jefferson was both the writer of the declaration of independence"

presents jefferson as both a subject and an agent for the verb "write" because if he was "the writer" then the declaration of independence was written by him, besides that fact, the sentence presents a dependent clause.

while the second sentence:

he was the nation's third president.

presents a basic subject+verb+object structure

so, to give a proper balance to the structure, or better said, to give a parallel structure, we must write a basic s+v+o structure in both sentences:

jefferson wrote the declaration of independence, and he was the nation third president.