Answer
4 and 5
Explanation
A constant term in an expression is a term that does is independent of any variables. This means that constant term will have non of the variables 
attached to them. In the expression 
we notice that the terms integers 4 and 5 are the only terms that are not coefficients of any of the variables in the expression.
They built a better currency trade so people could buy what they want without plying redicious amounts of money. the bisnusses were not making enough money, the great depression started arround 1929 so the great depression would be a cause of there spending habbits.
The indian resevoirs are meant to strictly separate them from the world, they stay secluded and only to themselves
The sun-centred model of the universe as proposed by Copernicus was not immediately accepted because it challenged the religious dogma that had held sway in the middle ages because this dogma required the earth to be at the center and man the creation of god as a unique event only on the earth so if helio centrism was to take hold it would relegate man and the earth to a lesser important aspect of the universe.
In a social system, there are peers and strangers to distract one from pursuing their work. While chatting with others, you may forget your train of thought or a good idea. People are likely to take you away from your work more so than a physical system (in which you can always turn off the TV, but not get people to quiet down)
