Which of the following is a theme from Macbeth? Those without convictions are easily manipulated.
The visible is more dangerous than the invisible.
Firm beliefs will help you succeed.
Friendship can withstand any challenge.

Those without convictions are easily manipulated.

Explanation:

The correct answer and the main theme from Macbeth are that without convictions people are easily manipulated. An example of the main theme the readers can see in the situation when Lady Macbeth decides to manipulate Macbeth into killing Duncan.

In those situations the readers could see the power of manipulation.

true

explanation:

faulty parallelism is a construction in which two or more parts of a sentence are equivalent in meaning but not grammatically similar in form.

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

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.

the problem is the last sentence, the first two have 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 all three sentences:

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.