Explanation:

- Investigate means to examine, study, or inquire systematically to uncover facts or information.

- Option 1: Discover

- Focuses on finding something unexpectedly or for the first time.

- Implies that something previously unknown is uncovered through investigation or exploration.

- Option 2: Reveal

- Means to make something known that was previously hidden or unknown.

- Often involves making information visible or public.

- Option 3: Search

- Involves looking carefully and systematically for something.

- Relates closely to the act of investigating, as both require thorough examination.

- Option 4: Prepare

- Entails getting ready or making arrangements for something.

- Often involves planning and organizing rather than examining.

- Correct Answer: Option 3: Search

.