Explanation:

An Excel Workbook is a file that contains one or more worksheets, along with any charts, graphs, or other visual representations of data that are included in those worksheets. It is the primary document in Excel, and it is where you can store, organize, and manipulate data.

Worksheets:
- A worksheet is a grid of cells where you can enter, edit, and manipulate data. It is the main component of an Excel Workbook.
- Worksheets are organized in tabs at the bottom of the Excel window, and each tab represents a different worksheet within the workbook.
- You can add, delete, rename, and rearrange worksheets to suit your needs. Worksheets are used to store and organize data in rows and columns.

Charts:
- Charts are visual representations of data that provide a visual summary of information. They are used to make data more understandable and easier to analyze.
- Charts can be created using data from a worksheet, and they can be displayed within a worksheet or on a separate chart sheet.
- Excel provides various types of charts, such as bar charts, line charts, pie charts, and more, to represent different types of data.

Worksheet and Charts in a Workbook:
- An Excel Workbook can contain multiple worksheets and charts.
- Worksheets are used to store and organize data, while charts are used to visually represent that data.
- By including both worksheets and charts in a workbook, you can create a comprehensive document that not only contains the raw data but also provides visual representations of that data.

Conclusion:
In conclusion, an Excel Workbook is a collection of worksheets and charts. Worksheets are used to store and organize data, while charts provide visual representations of that data. By combining both worksheets and charts in a workbook, you can create a comprehensive document for data analysis and presentation.