Many galaxies gravity source is in the form of black holes true or false

The answer is True. Hope this helped

All gravity is always the result of mass. Sone of the mass of a galaxy may be in the form of black holes that reside in it.

The gravity of a black hole is exactly the same as the gravity of the same amount of mass in any other form.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.