What do you mean by the word DEMAND? Are you referring to the NEEDS/NECESSARY THINGS IN ORDER TO LIVE OR SURVIVE or the WANTS itself?
In my opinion,if you are referring to the NEEDS this are the following:
They are totally the basic things in order to live on earth. But on the other hand, If your referring to the WANTS i can't tell you what it is because it depends on what are your wants like being Materialistic in a way like cellphones,car and etc...