Which is characteristic of a mineral?

a.
it must be man-made and crystalline.

b.
it must be naturally occurring and crystalline.

c.
it must be man-made and amorphous.

d.
it must be naturally occurring and amorphous.

Abiologist counts the number of rabbits in a population each year and observes a decrease in population. since the coyote population has exploded, the biologist concludes that the coyote population has had a negative interaction with the rabbit population. which describes the biologist’s actions? a.) experimentationb.) inferencec.) observationd.) interacting