Step 1: Definition of a search engine
A search engine is a software system designed to carry out web searches, i.e., to search the World Wide Web in a systematic way for particular information.
Step 2: Identifying the correct option
Bing is a search engine developed by Microsoft, used to search websites, images, news, etc.
Step 3: Elimination of other options
Excel, PowerPoint, and Word are part of Microsoft Office Suite and are productivity applications, not search engines.
Step 4: Conclusion
Thus, the correct answer is (1) Bing.