Final answer:
Variable whitespace refers to the presence of varying amounts of whitespace between words or characters in a text. It can be caused by typing errors, formatting issues, or specific coding languages that allow for flexible spacing.
Step-by-step explanation:
Variable whitespace refers to the presence of varying amounts of whitespace between words or characters in a text. It means that the spacing between words or characters can change and is not consistent throughout the text.
For example, if you have a sentence like 'Hello there', with multiple spaces between 'Hello' and 'there', then that would result in variable whitespace.
Variable whitespace can be caused by typing errors, formatting issues, or specific coding languages that allow for flexible spacing.