Investigation
Analysis
Search
Conclusion
Answer is Right!
Answer is Wrong!
The correct answer is D. Conclusion.
A conclusion is the final part of an argument or statement, where the main points are summarized and the overall meaning is drawn out. An investigation is a process of gathering information to answer a question or solve a problem. Analysis is the process of breaking down something into its component parts in order to understand how it works. Search is the act of looking for something.
In this case, the other three options are all processes that are used to gather information, while conclusion is not. A conclusion is the result of an investigation, analysis, or search, but it is not itself a process.