Resistance of force of equal magnitude acting in the opposite direction to an action force. a inertia b reaction c motion d unbalanced force

D

Explanation:

Unbalanced forces cause an object to start moving, stop moving, or change direction. Unbalanced forces acting on an object will change the object's motion. ... Equal forces acting in opposite directions are called balanced forces. Balanced forces acting on an object will not change the object's motion.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.