Aweak core generally results in all of the following except lower back pain.

i can't answer your question in very sad situation.

but if your situation is very bad, then you can find happiness by thinking about your past that has full of happiness.

or you should do meditation for some time to get rid off from that bad situation.

answer; /// i believe that the correct answer is (c); ///when the lungs expand, they fill with air from the atmosphere;