Introduction:
The LibreOffice Software Suite is a free and open-source office productivity software that includes several programs for word processing, spreadsheets, presentations, databases, and more. It is a popular alternative to proprietary office suites like Microsoft Office.

Explanation:
Among the options given, LibreOffice Excel is not a program included in the LibreOffice Software Suite. The correct answer is option 'B'.

LibreOffice Writer:
- LibreOffice Writer is a word processing program similar to Microsoft Word.
- It allows users to create and edit documents, format text, insert images and tables, and more.
- It supports a wide range of file formats, including its default ODT format and Microsoft Word's DOCX format.

LibreOffice Calc:
- LibreOffice Calc is a spreadsheet program similar to Microsoft Excel.
- It allows users to create and manage spreadsheets, perform calculations, create charts and graphs, and more.
- It supports a variety of functions and formulas, making it suitable for complex calculations and data analysis.

LibreOffice Impress:
- LibreOffice Impress is a presentation program similar to Microsoft PowerPoint.
- It allows users to create and deliver presentations, add multimedia elements like images and videos, apply transitions and animations, and more.
- It supports various slide layouts and templates, making it easy to create professional-looking presentations.

LibreOffice Excel:
- There is no program called LibreOffice Excel in the LibreOffice Software Suite.
- Microsoft Excel is a proprietary spreadsheet program included in the Microsoft Office suite.
- If you want to use a spreadsheet program in the LibreOffice suite, you would use LibreOffice Calc instead.

Conclusion:
In conclusion, among the given options, LibreOffice Excel is not a program included in the LibreOffice Software Suite. The correct answer is option 'B'.

LibreOffice is an open-source office suite that includes various software programs, but "LibreOffice Excel" is not one of them. The correct name for the spreadsheet program in LibreOffice is "LibreOffice Calc."