Well, my ELA teacher always told me to try to avoid saying me or I... anything in first person when writing an essay. So, I would start like this.
Nuclear Bombs (sad facts about bombs, or just opinions). So why have them at all. And that would go into the paragraphs of what you might have.
but If I were to start with I believe or I think, That's something you'll have to do yourself, because "I" It'self tells me that only that person can do it. But I will give you tips! Think about what you've wanted really bad, but your parents won't let you have it. You would most definitely give them reasons to why you should have it or what benefits it would do. Apply that to your writing, and I'm almost positive, It could help anyone.
I hope this helps :3
Answer:
The reasons why marks and grades don't reflect a student intelligence's is that they might not be good in academic subjects like mathematics, english, biology and etc but they might be really smart in coding, gaming and other non-academic stuff but it's important in reality. Others might be suffering a condition which doesn't allow them to do well, but if they weren't suffering from the condition in the first place, they would be smarter than an average person.
She was attacked by a shark