Agains its energy by eating something else

Consumer

Explanation:

A food chain is a series of distribution of energy in the form of food, when one organism is eaten up by the other organism. A producer is an organism which produces it own food and source of energy either from simple chemical substances like chemosynthesis or by utilizing the light energy from the sun, in the presence of water and carbon dioxide that is through photosynthesis.

A consumer is an organism which is incapable of producing it's own food, and depends upon the producers and other consumers for their food and energy requirements.  

i think the answer would be reserve.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.