The correct answer is 'Creating and editing documents.' This is the primary function because word processing software is designed to allow users to enter, modify, format, and output text, often with additional features like spell check and text formatting options. Other choices given might relate to functions available in different types of software. For instance, managing databases is a function associated with database software, not word processing software, and while functions like email or video calls can be performed on the same device, they are not the purpose of word processing software.