Here's why:
* Declarative sentences make a statement or express an opinion. They are the most common type of sentence and usually end with a period (.).
* They provide information about the subject, which is the noun or pronoun the sentence is about.
For example:
* The cat sat on the mat. (This sentence tells us what the cat did.)
* The sun is shining. (This sentence tells us about the state of the sun.)
Let me know if you'd like to explore other sentence types!