1) what are 2 ways to increase gravity between 2 objects?

The gravitational forces between two objects depend on the
product of their masses, and on the distance between them.

That gives you two distinct ways to increase the gravitational
forces between them:

1).  Increase the mass of one or both objects.

2).  Decrease the distance between them, i.e. move them closer together.

Sorry i don’t know what to do

Ibelieve the answer is d. macula  hope my answer has you : )