The correct answer is A. Instagram.
A search engine is a software application that helps users find information on the internet. It does this by crawling the web and indexing websites. When a user searches for something, the search engine returns a list of websites that match the search terms.
Instagram is a social media platform that allows users to share photos and videos. It is not a search engine.
Google is a search engine that is owned by Google LLC. It is the most popular search engine in the world.
Yahoo is a search engine that is owned by Verizon Media. It is the second most popular search engine in the world.
Bing is a search engine that is owned by Microsoft. It is the third most popular search engine in the world.