Answer:
A). An illustrated diagram of a samurai in full battle gear.
Step-by-step explanation:
Text features are characterized as the elements of the narrative that are apart from the actual content of the narrative. This promotes better comprehension as it allows the readers to locate particular information quickly and easily. It also helps in knowing the main points of key ideas that the author is emphasizing.
In the given excerpt, the use of an 'illustrated diagram to show Samurai in full battle gear' would help the readers in understanding the Samurai warriors' history and the modes in which they prepared for their battles. The diagram will not provide the information in a precise and highlighting manner that will be easier to understand but also allow them to know the key ideas effectively. Thus, option A is the correct answer.