Explanation:

Let’s break down the options:

- Option 1: Unlawful harassment

This is about repeatedly targeting someone with behavior that intimidates, scares, or threatens them. It’s not just about taking photos without consent—it needs a persistent pattern of behavior.

- Option 2: Conversion

This deals with someone taking your property and treating it as their own. For example, if Vijay stole Dhruv’s camera, that’s conversion. Photographing someone isn’t conversion.

- Option 3: Invasion of privacy

Here’s the thing: photographing the personal lives of someone without their consent is a classic example of invading privacy. There’s an expectation people have to keep certain areas of their lives private, and violating that—like taking unauthorized photos—falls squarely under this.

- Option 4: Trespass to chattels

This is about interfering with someone’s personal belongings, like damaging their computer or using their bike without permission. Again, not what's going on here.

Bottom line: The act described lines up directly with invasion of privacy—so yes, option 3 is correct.