What Type of Sentences Are These?

What type of sentence is this? Introduce myself... What type of sentence is this? I like dancing because What type of sentence is this? Gracefully, jumping or leaping

1. declarative 2. declarative 3. none of the above (incomplete sentence, not a complete thought)

Explanation:

Declarative Sentence: A declarative sentence makes a statement or expresses an opinion. It ends with a period.
Imperative Sentence: An imperative sentence gives a command or makes a request. It usually ends with a period, but it can end with an exclamation point for strong commands.
Interrogative Sentence: An interrogative sentence asks a question and ends with a question mark.
Exclamatory Sentence: An exclamatory sentence shows strong emotion and ends with an exclamation mark.
The first sentence "Introduce myself..." is a declarative sentence. The second sentence "I like dancing because" is also a declarative sentence. The third sentence "Gracefully, jumping or leaping" is not a complete sentence and does not fall into any of the categories mentioned above.
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