I believe it would be declarative because it is stating a fact.
Interrogative is a question and will allmost always end in a question marks.
Imperative is an order and will almost always end in a period.
Exclamatory shows excitement or concern ends most often with a exclamation mark.
I’m pretty sure it’s admire because it’s not discourage or display because those don’t make sense :)
For 17 number 4. For 18 number 1. For 20 number 4. Hope this helped.
