select the correct answer from the light.

Question

to form a nebula, _ pulls matter together or causes _

1.
a. gravity
b. heat
c. pressure
2.
a. infrared light emission
b. an explosion
c. pressure change

Answer 1

To form a nebula, gravity pulls matter together or causes pressure change.

So the correct answer is:

1. a. gravity
2. c. pressure change