Which of the following can you use to keep words together?

Using a non-breaking space is an effective way to keep words together in a document. This special character functions similarly to a regular space, but it prevents the words on either side of it from being separated at the end of a line. For instance, if you want to ensure that a person's first and last name are always displayed together without being split onto different lines, inserting a non-breaking space between the names guarantees they stay together.

In comparison, a tab space is primarily used to align text in a document, while paragraph breaks denote the end of a paragraph and typically initiate a new one. Line breaks can separate lines of text but do not serve the purpose of keeping specific words together, as they can lead to the separation of phrases or words that are intended to be kept intact. Thus, the non-breaking space is the correct choice for maintaining the integrity of word pairs or phrases in textual formatting.