Answer:
The author uses signal words.
Step-by-step explanation:
- The author uses signal words is the best answer choice. The Author utilizes active action verbs such as "Line" and "Do" which give direct commands and follows those commands up with clear descriptions of how to fold the airplane to the reader. They additionally use sequential words like "First" and "Then" to break up the verbs in the sentence which adds a sequence.
- The sequence is very well-known is incorrect. Although the sequence in the passage is clear, this choice does not offer enough context as to what exactly in the passage makes the sequence well-known.
- The steps are numbered is incorrect. Although the first step is numbered, the rest of the steps are not numbered in the passage.
- There is a picture showing the steps is incorrect. There are no pictures displaying the steps.