The statement that best-described gravity has to be 1. This is the force that pulls the objects to the ground. It should be remembered that gravity is known to be a force that pulls objects towards the center of the earth. This applies to anything that has mass. Take note that if there are other laws that are considered, then there may be slight changes to the rule.
Over the past years, there are some changes to this description namely that gravity can be because of the attraction between two different objects that have masses. It is probable that there are still going to be other changes about that in the long run.