A force is when two forces cancel each other out and do not affect the motion of an object

Friction and gravity are at work in each picture. Explain how each are at work and how they work together. Balanced forces - Two or more opposite forces are balanced forces if their effects cancel each other and do not cause a change in an object's motion.

Explanation:

Balanced forces are equal and opposite forces that act on the same object. That's why they cancel out. Action-reaction forces are equal and opposite forces that act on different objects, so they don't cancel out. In fact, they often result in motion.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

the answer would be..

b. sucking