Metabolism is the process by which your body converts what you eat and drink into energy. During this complex biochemical process, calories in food and beverages are combined with oxygen to release the energy your body needs to function so i would say that it is A but i could be wrong so good luck
True...yes it is an example of Communication Roadblock
Don't put pathogenic contaminants in food keep food natural
Paranoia? It can also be restlessness and high blood pressure. whichever one seems right to you. hope this helps!