Hi there!
As per question, there are two possible answers. They are "The repeated words emphasize controlling thoughts and dreams." and "The repeated words make thoughts and dreams easier to grasp.". However, I'm going with the answer having the Option:-
The repeated words make thoughts and dreams easier to grasp.
Proof :-
Let's check the other given options.
(1) The repeated words emphasize controlling thoughts and dreams.
It's the same meaning as the theme given. So, it won't be asked directly.
(2) The repeated words caution readers against danger.
The given lines aren't frightening for the readers. These are just the lines showing about it. So this option won't be applicable.
(4) The repeated words explain the importance of love and honesty.
It is completely different from the given extract of the poem. We are talking about Triumph and Disaster. So, that option is also incorrect.
Hence, Proved that the answer is (3)"The repeated words make thoughts and dreams easier to grasp."