Which of the following is a popular spreadsheet application?

Microsoft Excel is widely recognized as a leading spreadsheet application used for a variety of purposes, including data analysis, financial calculations, and creating visual data representations through charts and graphs. It is part of the Microsoft Office suite and offers numerous features that facilitate the organization and manipulation of numerical data. Users can perform complex calculations, utilize functions and formulas, and create pivot tables to summarize information efficiently.

In contrast, the other choices represent different types of software. Adobe Photoshop is an image editing software primarily used for graphics design and photo editing, while Microsoft Word is a word processing application used for creating text documents. Mozilla Firefox is a web browser used for accessing the internet. Each of these applications serves a specific function that differs from the primary purpose of Excel, which is designed to handle and analyze data in a spreadsheet format.