What is dedarative?

It seems there might be a typo in your question, as "dedarative" does not correspond to a recognized term in English. If you meant "declarative," it refers to a statement that conveys information or expresses an assertion, typically used in grammar to describe sentences that state facts. Declarative sentences usually end with a period and can be simple or complex in structure. If you were referring to a different term, please clarify for more accurate information.