Answer:
B). Instruments.
Step-by-step explanation:
Textual aids are characterized as the visual instruments that the author provides within the text in the form of italicized phrases, diagrams, images, graphs, etc. to assist the readers in better understanding it. These elements primarily function to capture readers' attention towards the particular section/parts of the text and offer support to the content of the text so that it assists them in significant ideas conveyed through the text. Thus, option B is the correct answer.