The correct French word that fits the definition "The grass is this color" is "marron."
Explanation:
1. In French, the word "marron" translates to "brown," which is a color commonly associated with grass.
2. When describing the color of something in French, it is important to use the correct adjective that matches the noun. In this case, "marron" is the appropriate color to describe grass.
Therefore, the correct French word that fits the description given is "marron."
