The correct answer is "Reducing a sentence to its essential meaning". Sentence simplification means reducing a sentence to its essential meaning by removing extra details.

The correct answer is "The main idea". When simplifying a sentence, you should keep the main idea and remove unnecessary details.

The correct answer is "A sentence with multiple clauses". A complex sentence contains multiple clauses including at least one dependent clause.

The correct answer is "Identify the main subject and verb". The first step in simplifying a sentence is to identify the main subject and verb.

The correct answer is "Clauses that depend on a main clause". Subordinate clauses are clauses that depend on a main clause to make sense.

The correct answer is "To focus on core meaning". Removing extra details when simplifying helps you focus on the core meaning of the sentence.

The correct answer is "A word or phrase that describes something". A modifier is a word or phrase that provides additional description.

The correct answer is "Remove them". When simplifying, you should remove unnecessary modifiers that do not affect the core meaning.

The correct answer is "They connect clauses". Conjunctions in complex sentences connect clauses to show relationships between ideas.

The correct answer is "The central part of the sentence that can stand alone". The main clause is the central part of a sentence that can stand alone as an independent sentence.

The correct answer is "Unnecessary repetition of ideas". Redundancy in sentences is the unnecessary repetition of ideas or words.

The correct answer is "To make sentences clearer and shorter". Eliminating redundancy makes sentences clearer, more concise, and easier to understand.

The correct answer is "A clause that describes a noun". A relative clause is a dependent clause that describes or modifies a noun.

The correct answer is "Shorten or remove them if not essential". When simplifying, you can often shorten or remove relative clauses that are not essential to the core meaning.

The correct answer is "Understand complex sentences easily". The goal of sentence simplification in TOEFL is to help you understand complex sentences easily and quickly.

The correct answer is "A clause necessary for meaning". An essential clause is necessary for understanding the basic meaning of the sentence.

The correct answer is "A noun phrase that renames another noun". An appositive is a noun or noun phrase that renames another noun next to it.

The correct answer is "Remove them if not needed". Non-essential appositives can be removed when simplifying without losing the core meaning.

The correct answer is "Focus on subject, verb, and core idea". The best simplification strategy is to focus on identifying the subject, verb, and core idea of the sentence.

The correct answer is "The meaning may be lost". If you remove too much information from a sentence, the original meaning may be lost.