What does the term 'text functions' refer to in the context given?

The term 'text functions' refers specifically to functions that are designed to manipulate text strings. These functions are utilized to perform various operations on text data, such as concatenation, searching, extracting substrings, converting case, and replacing parts of text. In the context of data processing, text functions can format, clean, or analyze textual information, which is essential for effective data manipulation.

By using text functions, users can streamline text-related tasks within their datasets, ensuring that they can efficiently manage and utilize the textual elements of their data. This makes option B the most accurate representation of the concept of text functions in the given context.