Here are the official directions for Improving Paragraphs:

The following passage is an early draft of an essay. Some parts of the passage need to be rewritten.

Read the passage and select the best answers for the questions that follow. Some questions are about particular sentences or parts of sentences and ask you to improve sentence structure or word choice. Other questions ask you to consider organization and development. In making your decisions, follow the conventions of standard written English. In choosing answers, follow the requirements of standard written English.

Here’s a quick translation of what these directions mean: Improving Paragraphs questions present you with a rough draft of an essay. Some questions will ask you to fix or combine individual sentences, and some will address the essay as a whole. Note again the SAT’s emphasis on standard written English.
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