A positive cross elasticity of demand means that two goods are substitutes.
Explanation:
The cross elasticity of demand for substitute goods is always positive in light of the fact that the demand for one good upsurges when the price for the substitute good increases. For instance, if the price of coffee rises, the quantity demanded for tea (a substitute brew) increases as consumers switch to a more affordable yet substitutable alternative. This is mirrored in the cross elasticity of demand formula as well. Both the numerator (% change in the demand of tea) and denominator (the price of coffee) show positive escalations.
Well, it is a desert, and in deserts, generally there isn't much rain. Because of that, it would probably be the hardest to farm in the Sahara. Hope this helps :)
Domestic tranquility is basically the people being happy with the country and not being in danger. They were concerned about it because without it, it could lead to revolts and revolutions.
