Explanation:

Certainly! Let's look at the sentence and the options to understand the meaning of the underlined word "eavesdropping."

- Original Sentence: We caught him eavesdropping outside the window.

- Underlined Word: Eavesdropping

- Meaning: Listening to someone's conversation secretly without their knowledge.

Now, let's analyze the options:

- Option 1: Wandering aimlessly

- Explanation: This means walking or moving around without a specific direction or purpose. It doesn't fit the context of secretly listening.

- Option 2: Talking loudly

- Explanation: This refers to speaking in a high volume. It is quite the opposite of eavesdropping, where one listens quietly.

- Option 3: Listening secretly

- Explanation: This matches the meaning of "eavesdropping," which involves quietly listening to a conversation without the speakers knowing.

- Option 4: Reflecting calmly

- Explanation: This means thinking about something in a peaceful way. It's unrelated to the act of listening secretly.

Option 3, "listening secretly," is indeed the correct choice. Well done!