Step-by-step explanation:
Gravity is defined as the force with which the object is pulled towards Earth's center.
The gravitational force between two masses is given by :

Here,
d is distance between masses
It can be seen that the gravitational pull between two objects increases as the mass increase as force is directly proportional to the product of masses.
Also, the gravitational pull decreases when the distance between two objects increases, as force is inversely proportional to distance.
Hence, the correct statements are : 1, 3 and 4.