Ineed with the top part that isn’t filled out . i’m kinda just confused on what it is asking somebody

Iam in desperate need of with this !

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

When a septic tank backs up a goes in to clean it out