Which statement is true about the gravitational force? a. it
only acts on objects that are close to each other. b. it acts
on all objects all of the time. c. it only acts on objects that
are in contact. d. it only acts on objects that are moving
apart.

"Option B It acts  on all objects all of the time.

Explanation:

"Gravitational force" is a kind of force that  will attract any object with a mass. It is a  "natural phenomenon" where all the things, including in planets in-universe, of mass or energy, are brought towards each other.  

Like the earth’s gravity helps in giving weight to objects and the ocean tides are caused because of the moon’s gravity. The example of gravity force is the force with which sun holds together the gases in it.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.