What is true about the difference between a mineral and a rock? Select one: a. A mineral is required to be naturally occurring, but a rock is not. b. A rock is required to be naturally occurring, but a mineral is not. c. A rock is generally made up of an aggregate of minerals, but this is not a requirement. Rocks can also be made up of non-mineral matter.

Student conducts an experiment to see how music affects plant growth. the student obtains four identical plants. each one is potted in the same type of soil and receives the same amount of sunlight and water each day. plant a listens to classical music for three hours each day. plant b listens to rock music for three hours each day. plant c listens to country music for three hours each day. plant d does not listen to any music at all.2.     based on the experiment in the scenario, which visual aid would be  in showing the change in the plants' heights over time?   a. a line graph  b. a timeline  c. a bar graph  d. a pie chart