How is a root word used to understand a text? It reveals the style of the writer. It alerts the reader that a technical term is being used. It gives the reader an understanding of the writer’s tone. It provides the foundation for a word’s meaning.

It provides the foundation for a word’s meaning.

Explanation:

Let's say, for example, you encountered the word "unhappiness" within a reading text. And, let's say that you had no idea whatsoever what the affixes -un and -ness meant. You would at the very least be able to recognize (a form of) the word 'happy' as the root of the larger word and know that the word had something to do with the concept of "happy."

D: It provides the foundation for a word’s meaning.

Explanation:

edg2020

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.