Which of the following statements about the phosphorus cycle is true? a. in living organisms, phosphorus can be found in nucleic acids. b. phosphorus in aquatic ecosystems is only found in sediment. c. elevated levels of phosphorus in aquatic ecosystems is always beneficial. d. the soil plays no part in the phosphorus cycle.

hi,

the answer is third world countries, take for instance china, they restricted each family with only one child,

hope this !

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)