HELP ASAP FOR BRAINLIEST! Which of these describes a nebula?

A. star much larger than the sun
B. star close in size to the sun
C. cloud of gas and dust
D. cloud of gravity and pressure

How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?