Question

The search engine’s business model __________ around the fulcrum of trust.

• A. revolves
• B. plays
• C. sinks
• D. bursts

Hint:

In English usage questions, look for clues in nearby words. Phrases like {“around the fulcrum”} strongly suggest verbs such as {revolves} or {centers}.

Answer 1

The Correct Option is A

Step 1: Examine the sentence carefully. 
The sentence given is:
“The search engine’s business model _____ around the fulcrum of trust.”
The expression “around the fulcrum” implies something that is centered on, or depends strongly upon, a core idea.

Step 2: Consider the meaning of each option.
(A) revolves: This verb clearly expresses the idea of being centered on or organized around a central point.
(B) plays: This does not fit either grammatically or in meaning within the sentence.
(C) sinks: This verb does not match the intended idea of dependence or centrality.
(D) bursts: This is completely unrelated to the context of the sentence.

Step 3: Select the most appropriate word.
Among the options, “revolves” fits naturally and accurately conveys the intended meaning.

Step 4: Final sentence.
 

\[ \text{The search engine’s business model revolves around the fulcrum of trust.} \]