The over-population of many South American countries mainly impacts the United States in a negative manner.
<u>Explanation:</u>
Most of the South American countries are 'agriculturist economies' with minimal technological advancements available compared to most North American countries.
The service sector employment rate in these countries is also considerably low.
The over-population of these countries has been resulting in the exploitation of natural resources, the downgrading of the microeconomic structure and thus, people fleeing to the United States in search of better employment opportunities.
This, in turn, has been causing faster depletion of resources and imbalance in employment distribution in the United States.
The correct answer is "C". The latitude 23.5 degree north receives the sun light directly overhead. This latitude is called tropic of cancer. Whereas for southern latitude of 23.5 degree, the sun light is again receives directly overhead and this latitude is called tropic of Capricorn.
Convection currents form in atmosphere and freshwater lake. Convection currents occur when there is difference in temperature in both substances (eg. fluids). When there is a difference in temperature, the hot substance rises and the colder one sinks. The flow then will be form a hotter to the colder region.
Rising population densities and the consequent demand for arable land gave rise to serious soil erosion, deforestation due to the need for firewood, and depletion of soil nutrients.
