The word part that means green is "chlor". To figure this out, you can break down the word and examine its parts. In this case, the word is "chlor," which is derived from the Greek word "khloros," meaning green. The prefix "chlor-" is commonly used in words related to green color or ingredients, such as "chlorophyll" (the green pigment in plants) and "chlorine" (a chemical element with a yellow-green color). Therefore, "chlor" is the correct word part that means green.