Answer:
For many years scientists have studied our own solar system. But until the last few years, we knew of no other solar systems. This may seem surprising, as the Sun is one of about 200 billion stars (or perhaps more) just in the Milky Way galaxy alone.
Explanation:
The best answer would probably be C. It has frequent dust storms in the spring
The answer is mold.
A mold fossil is formed when sediment harden around the buried remains of an organism.
