Well Babygirl123 the gravitational force would increase or become stronger as the mass of a planet say Earth increases. while as a little planet such as Pluto has a little to no amount of gravitational force.
Stronger.....................becasue gravitational force is force pulling all matter (anything that has mass and occupies space) . The more the matter (which also includes mass), the more the gravitational force. <span>So, the answer is stronger. </span>