Answer:
Because you can also get minor things like double joints, crooked bones, crowding teeth,ect
Your heart pumps blood so it can circulate to your tissues as well as get oxygen from your lungs, if your heart can’t pump blood well i.e. heart attack you can feel short of breath
I believe it was The Continental Drift Theory , i could be wrong
Developing Nations currently produce about 2600 kcal of food per person per day. The growth in food consumption around the world has been accompanied by a significant structural changes and a shift in the diet away from the staple foods such as roots and tubers towards more livestock products and vegetable oils.
