The most useful tool for research out of the options provided is a web browser. It allows for easily accessing and searching for information online, which is essential for conducting research. Word processing software can also be useful for writing and organizing research findings, but a web browser is more directly relevant for gathering information. Presentation software may be useful for organizing and sharing research findings, but it is not as essential as a web browser for the initial stages of research. A messaging app is not typically necessary for conducting research.
