The word that means included within a larger category is: subsumed.
The word, "subsumed" means being enclosed into another. This means that the thing being referred to contains another.
In the excerpt above, we see that the metamorphic rocks consist of marble, slate, and quartzite. So, it subsumes the listed items.
Learn more about metamorphic rocks here:
https://brainly.com/question/14021434