Answer:
Object 3
Step-by-step explanation:
According to Newton's Law of Universal Gravitation, the mass of an object is directly proportional to gravitational attraction. This basically means that the greater the masses of the objects, the greater the gravitational attraction.
It also states that distance is indirectly proportional to gravitational attraction. This means that the farther they are apart objects are from each other the lesser the gravitational attraction.
Now taking your scenario, because the objects are equidistant, distance would not be a factor in the differences in attraction. But as you can see, object 3 has the least mass. This means that among all the objects surrounding object 1, it would have the least gravitational force.