A web browser is a software application used to access and view websites on the internet. Internet Explorer is a well-known web browser developed by Microsoft.
Step 1: Analyze the options.
(A) Google: Google is a search engine and a technology company, not a web browser. However, Google Chrome is a web browser.
(B) Facebook: Facebook is a social media platform, not a web browser.
(C) Internet Explorer: This is a web browser developed by Microsoft and was one of the most widely used browsers for many years.
(D) Instagram: Instagram is a social media platform for sharing photos and videos, not a web browser.
Step 2: Conclusion.
Among the given options, only Internet Explorer is a web browser. Hence, the correct answer is (C).
Final Answer:
\[
\boxed{(C) \, \text{Internet Explorer}}
\]