A Good Sentence closer wraps up the topic. For example 'I hope you learned some facts from this information'.
A sentence closer is at the end of the sentence and normally, before the closer, there's a comma.-.-
Something at the end of a sentence. dur :D
That storm's getting closer.
heres an example: the temperature was rising as the hot summer day got closer to the afternoon. you can elaborate if you'd like
No, "closer" is not a preposition; it is an adjective. Prepositions typically show the relationship between a noun/pronoun and other words in a sentence.
Example sentence - The painting appeared dimensional until you looked closer.
The inclusion for the Project made us closer.
He moved to be closer to the warmth of the fire.
We are ready for inspection. This item bears closer inspection.
Everyone was frantic as the fire got closer to the neighborhood.
The climax of a story is usually closer to the end than the beginning
The kitten nestled closer as it began to purr.