Slum areas called shantytowns occur in major african cities, housing over
percent of urban populations.
a. all; 70
b. nearly all; 60
c. some; 40
d. five major; 50

The question says, 'slum areas, usually called Ashanty towns exist in major African cities, housing percent of urban population. The correct option is B. Slum areas occur in almost all the major African countries, the biggest one in the world is found in Cape town, South Africa. The majority of the slum dwellers are between age 15 and 24. Africans are making efforts to reduce slum areas.

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.

Water flows along the east coast and across the western tropical pacific towards south america, while they both are directed towards that way,  el niño does not directly affect the southern flow of water along the coast.