Which one of the following sentences is correctly punctuated? smile when you say that ,partner? look at me, then say what you have to say? look up, look down, and look all around? when will the winter end?

The rightly puctuated sentence is the last one:

"When will the winter end?"

This one is the only one with the meaning and construction of an interrogative sentence, while the others had affirmative and imperative meaning and constructions.

Therefore, and considering that the others had the commas rightly inserted, all sentences, but the last, had the interrogation marks wrong.

summary - a brief statement or account of the main points of something.

main idea - the main idea is defined as the main point of a speech or piece of writing.

paragraph - a distinct section of a piece of writing, usually dealing with a single theme and indicated by a new line, indentation, or numbering.

it is about the use of non animal tested cosmetics.