Which type of sentence makes a statement about a person, place, thing, or idea?

A declarative sentence is specifically designed to make a statement about a person, place, thing, or idea. This type of sentence conveys information or expresses an opinion, and it typically ends with a period. For example, "The cat is sleeping on the couch" is a declarative sentence that provides information about the cat’s location.

In contrast, exclamatory sentences express strong feelings or emotions and often end with an exclamation mark, such as "What a beautiful day!" Conditional sentences express a condition and its possible outcome, often using "if" clauses, like "If it rains, we will stay inside." Imperative sentences give commands or requests, such as "Please close the door," and they may end with either a period or an exclamation mark depending on the urgency of the command.

Thus, the declarative sentence is unique in its role of purely stating an idea or fact, distinguishing it from the other types of sentences mentioned.