The population of developing nations is increasing at than developed nations.
1slower
2equal
3faster

2. Equal

The development of the countries does not really affect the population. Look at China. China is still very much underdeveloped compared to America, but yet it has 2x as many people as America and makes up 1/4 of the human population. 

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.