Final answer:
The term that specifically means to add new text, slides, rows, or columns in various software applications is 'Insert' (A), a key feature in word processors, presentation programs, and spreadsheets.
Step-by-step explanation:
The term that means to add new text, slides, rows, or columns in a document, presentation, or spreadsheet is Insert (A). This action is commonly required across various software applications such as word processors, presentation programs like PowerPoint, and spreadsheets such as Excel. The insert function is a fundamental feature that allows users to add content wherever they need it within their document or file.
While append might sometimes be used to mean adding to the end of a piece of text or data, in the context of software functions, insert is the more precise term for adding new elements at specific locations within a file. The other options, such as add, append, and include, although related, do not specifically refer to the function of inserting within software applications.