Which method would be used to convert spatial data into a different file format?

The method used to convert spatial data into a different file format is correctly identified as Data Format Conversion. This process specifically focuses on changing the structure and encoding of the data to allow it to be read and utilized in various software applications. Different systems and applications may require data in specific formats to function correctly.

Data Format Conversion ensures that the spatial integrity of the data—such as coordinates, geometries, and associated attributes— remains intact while providing the flexibility needed to make the data compatible with various GIS and data analysis tools.

In contrast, other options such as Data Modification typically involve altering the content or characteristics of the data without necessarily changing its format, while Data Transformation often refers to changing the data's structure or scaling it differently, which may or may not involve a format change. Data Cleaning focuses on improving the quality of the data by identifying and correcting errors or inconsistencies, but it does not involve converting data into different formats.