Man vs Self is internal conflict
Assure could mean making sure something happens, to comfort or remove doubts from a person, or make someone sure of something.
If it's one word answers it could be persuading, guaranteeing, promising, convincing, reassure, satisfy, or tell.
I hope this helps without answer choices it's kind of hard to know what kind of answer you need. Have a great day!
The answer to the question is called "homophones". These words have same pronunciation, but different spellings.
So that you don't drift off from the topic and to make it nice and simple