please help! i’m trying to understand but i can’t:( please

Answer:
It's asking you what type of sentence it is and why.
Explanation:
For example, number 1 is declarative because it is saying what they're going to do, they are not asking.
Answer: If the sentence is a statement and ends with a period(.), then it’s declarative. If it’s a command, or telling someone to do something, and ends with a period(.), it’s imperative. If it is asking a question and has a question mark(?), it’s interrogative. If it has an exclamation point(!), it’s exclamatory.
Explanation:
To explain [Why?] say whether it’s a question, command, statement, or an exclamation. You may need to what is being asked or what the command is, etc.