Which of the following statements is true? a. only objects that are very close together exert gravitational forces on each other. b. objects can only exert gravitational forces if they are at least as dense as water. c. only objects that are as large as planets exert gravitational forces on other objects. d. any object with mass exerts a gravitational force on all other objects.

D. Any object with mass exerts a gravitational force on all other objects.

Explanation:

The gravitational force with which the earth draws all the bodies around it is called weight force or simply weight. Caution: When we refer to the amount of matter that makes up a body, we refer to mass, not weight. It is important not to confuse these concepts, as weight is the gravitational force that a body can exert on any other body that has mass. Mass is just an amount of matter, usually measured in grams or kilograms, for example, contained in a body.

Gravitational force is an attractive force that arises between all bodies with mass. Planet Earth, for example, is able to draw the bodies around it toward its center because of its gravitational field.