What countries share a region of glaciers in south america?
chile
brazil
uruguay
argentina

Glaciers form in the Andes in South America - and only there, so we are looking for countries that are not placed on the Andes.

Argentina and Chile are the two countries from the list that share a region of glaciers - and there are some others, such as Bolivia and Peru.

2. x2 + 8x + 12 = 0 to prove: x = -6 or x = -2

Answer (d) may increase or decrease porosity through dissolution or deposition;