What does the term "truncate" mean?

The term "truncate" specifically means to shorten something by cutting off a part of it. This definition is derived from the roots of the word, which comes from the Latin "truncate," meaning "to cut." In various contexts, whether discussing text, audio, or even physical objects, truncating signifies the act of eliminating excess or unnecessary portions while retaining the core or essential elements.

In this case, "to shorten by cutting off" captures the essence of what it means to truncate perfectly, making it the most accurate choice. The other options imply actions that are contrary to the concept of truncation, such as prolonging, modifying significantly, or adding content, which do not align with the meaning of cutting down or shortening. Understanding the direct association between the action of truncating and the literal shortening process clarifies why this answer is the most fitting in the context of the question.