SAT Reading and Writing Practice Question #1194 (Hard (800)) | Test Citadel
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SAT Reading and Writing Difficulty: Hard (800)

Digital SAT Reading and Writing Practice Question #1194

Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.

The Atacama Desert, often considered the driest non-polar desert in the world, hosts several unique ecological phenomena. Among these are the 'lomas' fog oases, isolated patches of vegetation that thrive solely on moisture from coastal fogs. These oases, which are crucial for the survival of numerous endemic species, represent a remarkable example of adaptation to extreme aridity. The most prominent example is the Pan de Azúcar National Park Lomas which relies entirely on coastal fog for its moisture supports a fragile yet remarkably diverse ecosystem. Which choice best corrects the punctuation in the underlined portion of the sentence?
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Socratic AI Engine Step-by-Step Derivation
0ms Precomputed
Tactical Insight (Hint 1)

Focus on identifying the main subject and its primary verb in the sentence. What role does the phrase 'which relies entirely on coastal fog for its moisture' play in relation to the subject?

Elimination Framework (Hint 2)

Consider the difference between restrictive and non-restrictive clauses. When is a comma (or a pair of commas) necessary to set off a descriptive phrase or clause?

⚡ 15-Second Desmos Speed Hack

⚡ Hack the Test: When you see a descriptive phrase or clause inserted between a subject and its main verb, immediately check for proper comma usage. If the descriptive element provides extra, non-essential information (especially when modifying a proper noun or a clearly identified entity), it's likely a non-restrictive clause or phrase that needs to be set off by a pair of commas. If only one comma is present, or no commas at all, it's often a punctuation error. Look for the option that 'sandwiches' the descriptive part with commas.

Masterclass Solution & Distractor Trap Analysis

The original sentence contains a grammatical error related to punctuation and sentence structure. The phrase 'which relies entirely on coastal fog for its moisture' is a non-restrictive clause. A non-restrictive clause provides additional, ...

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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