Final answer:
The material that would be most easily scratched is quartz.
Step-by-step explanation:
The question relates to the subject of Geography and specifically the Mohs Scale which is used to measure the hardness of minerals. The Mohs Scale assigns a score from 1 to 10, with 1 being the softest and 10 being the hardest. In this case, the material that would be most easily scratched is the one with the lowest score on the Mohs Scale. From the options given, quartz has a score of 7 which is the lowest and therefore would be the easiest to scratch.
Learn more about Mohs Scale