Spreadsheets are used to perform calculations in ___________ and produce graphs.

Spreadsheets operate on a grid format composed of rows and columns, where data is organized and managed. Each intersection of a row and a column creates a cell, which is where the actual data is entered. This structure enables users to easily perform calculations on data within these cells using various functions and formulas. Additionally, the data organized in rows and columns can be visually represented through graphs, which help in analyzing trends or patterns effectively. The layout of rows and columns is fundamental to the functionality of spreadsheets, making this option the most accurate choice.