Which two file types can store both vector and raster data?

The correct answer is based on the characteristics of the file types mentioned. EMF (Enhanced Metafile) and PDF (Portable Document Format) are capable of storing both vector and raster graphics, making them versatile for various applications, especially in mapping and design contexts.

EMF is a vector graphics file format that can also embed raster images, which is useful for maintaining image quality while allowing for scaling without loss of clarity. PDF files, similarly, can contain a mix of vector graphics, raster images, text, and even interactive elements, allowing for a comprehensive way to present spatial data and graphics effectively.

In contrast, the other options do not provide this dual capability. XML and HTML are primarily mark-up languages, and while they can describe vector data through specific tags, they don't inherently contain graphic data types. CSV and TXT are plain text formats that hold data in tabular form without any graphical representation, and JPEG is a raster image format that does not support vector data at all; TIFF, while versatile, is primarily a raster format. Thus, EMF and PDF stand out as the correct answer for storage formats that effectively handle both types of data in a seamless manner.