One consequence of newton's third law of motion is that a. every object that has mass has inertia b. a force acting upon an object increases that objects acceleration c. all actions have equal and opposite reactions d. none of the above

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.