Most likely audience and purpose. It's not like there are timed applications and the way you write it is up to as long as it makes sense.
Answer:
The answer has to be your opinion.
Explanation:
There is no right or wrong answer.
The last one "he makes a wish of eternal youth without considering the consequences of his actions" is ended with a question mark but it isn't phrased as a question and should be ended by a period instead. The fourth sentence is the correct answer.
