Final answer:
The use of numbered lists is the most effective text feature to emphasize the order of steps in procedural texts, offering a clear guideline for the sequence of actions.
Step-by-step explanation:
Which of the following text features might be used to emphasize the order of the steps in procedural text? The correct answer to emphasize the order of steps is b) Numbered lists. Numbered lists are particularly useful in procedural texts because they clearly indicate the sequence that steps should be followed, making the instructions easier to understand and follow.
While other text features like bold font, italicized words, and underlined headings can also be used for emphasis, they do not inherently suggest a specific order as numbered lists do.