Choosing the Right Preposition: Mesmerized by Eloquence

This question asks us to select the most appropriate preposition to complete the sentence: "The audience was mesmerized _______ the speaker's eloquence." We need to understand how the word 'mesmerized' is typically used with prepositions, especially when describing the cause of being captivated.

Understanding 'Mesmerized' and Preposition Usage

The word 'mesmerized' means to capture the complete attention of someone, as if by magic; to fascinate or hypnotize. When we use 'mesmerized' in a sentence like this, we are often describing the effect something or someone has on an audience or person. The audience is the recipient of the action (being mesmerized), and the speaker's eloquence is the cause or agent that produced this effect.

Let's look at the common prepositions used with 'mesmerized':

• Mesmerized by: This is the most common and standard usage when indicating the agent or cause. The structure is typically 'Subject + was/is + mesmerized + by + Agent/Cause'. This suggests the agent caused the mesmerizing effect.
• Mesmerized with: While sometimes used informally, 'with' often implies being filled with a particular feeling or quality rather than being acted upon by an external cause. It's less common in this specific context.
• Mesmerized to: 'To' usually indicates direction or a recipient, which doesn't fit the grammatical structure here.
• Mesmerized for: 'For' typically indicates purpose or duration, which is not applicable here.

Analyzing the Sentence Structure

In the sentence "The audience was mesmerized _______ the speaker's eloquence," the audience is in the passive voice ('was mesmerized'). This means the audience received the action. The phrase "the speaker's eloquence" is the source or cause of the audience being mesmerized.

Consider these examples:

• The crowd was captivated by the performance. (Performance caused captivation)
• She was impressed by his knowledge. (Knowledge caused impression)

Following this pattern, the speaker's eloquence caused the audience to be mesmerized. Therefore, the preposition 'by' fits perfectly to indicate the agent causing the mesmerizing effect.

Step-by-Step Selection

1. Identify the core meaning: The audience was deeply fascinated.
2. Identify the cause: The speaker's eloquence.
3. Determine the grammatical structure: Passive voice ("was mesmerized").
4. Select the preposition that links the passive subject (audience) to the agent/cause (eloquence). The preposition 'by' is standard for indicating the agent in passive constructions.

Thus, the completed sentence is: "The audience was mesmerized by the speaker's eloquence."

Final Answer Choice

Based on the grammatical structure and common usage, the most appropriate preposition is 'by'.