There are different star systems. Binary star systems consist of two stars. Multiple star systems consist of two or more stars. The meaning of star system is "A small number of stars."
I think it's either A) a group of hundreds of stars, or B) a group of two or more stars. I would assume it's B), but i could be wrong.
Hope this helps!
I am thinking the rock that forms from lava that cools quickly is D) Obsidian.
Answer:
B. Polio
Explanation:
The poliovirus causes brain damage (resulting in paralysis) and muscle degeneration. You're welcome.