Question

Declarative sentence​

Answer 1

Declarative or Assertive sentences... are simple sentences that end with a full stop

Example - You are a good girl.

....the sentence have full stop...

so it is declarative sentence

Answer 2

A declarative sentence is a sentence that makes a statement – in other words, it declares something. This kind of sentence is used to share information – for instance, stating your point of view or a fact.