B. South America is below the equator and on the west side
The slant of the earth is called the earth's axis. Earth's tilt is 23.5 degrees on its axis.
I hope this helps:)
Because once they are all gone we will not get them back for several millions of years or we may never get them back
Mainly the economy is rising so people will be able to afford sending their kids to school.
The only disadvantage I could think of would be price of equipment needed to produce energy from the source (i.e. price of solar panels)