<em>Answer: In economics, the law of increasing costs is a principle that states that to produce an increasing amount of a good a supplier must give up greater and greater amounts of another good. ... If the economy is at the maximum for all inputs, then the cost of each unit will be more expensive.</em>
I would say A, since the north of Mexico is still temperate, its middle is subtropical, more animals can adapt to the climate and habitat
Life,liberty, and pursuit of happiness
Nowadays, and after fresh water, <em>Sand</em> is the most used natural resource on the planet.
Sand is a loose, fragmented material, comprised of tiny particles of scattered rocks, shells, corals and other minerals.
The most common sand is comprised of <em>quartz</em> and feldspar, which are high in silica content, stuffs used to make glass; and to produce semiconductor silicon chips for microprocessors.
Sand is the raw material used to produce integrated circuits and the glass for contact lenses.
And Sand processing has grown into a multi billion dollar business, turning the role of Sand in our lives widespread farther away our beloved beaches.
