Which element represents the result of a calculation or user action?

The correct choice is based on the functionality aimed at representing the outcome of a calculation or a user action in programming or web design contexts. An output tag is specifically designed to display results that emerge from computations or interactions initiated by users. This makes it crucial for dynamic content representation during runtime, enabling users to see immediate feedback based on their inputs or the results of the data processing.

In contrast, while the result tag might suggest a function involving outcomes, it is not commonly recognized in standard programming lexicon or web standards. Similarly, a display tag could imply showing data but lacks the specificity and common usage associated with output tags. The input tag, on the other hand, is intended for collecting user data rather than presenting results, making it less relevant to the question's focus on displaying results from actions or calculations. Thus, the output tag is the most appropriate choice as it directly correlates with showcasing results.