Sorry, I don't really understand your question but if you are asking what Modal verbs means, it means: We use <span>modal verbs to show if we believe something is certain, probable or possible (or not). We also use modals to do things like talking about ability, asking permission making requests and offers, and so on.</span>
The placement of the adjective clause is correctly placed in this sentence
Answer:
Hello Principal___,
I am writing you today in regards to our schools security system. As a student here my top priority is to learn, and yours is to keep us safe. Thats why I wanted to ask you if you could arrange a higher tech security system for our school. This includes more cameras, highering a police officer, and more security gaurds. If we do this we can prevent any further problems on our campus. I hope this will lead to a change at our school.
Thank you,
_______
Explanation: Hope this helps :)