What do the dates next to nearly all sections of the wall show
the great wall of china chapter 7 section 3

Migration people get up and go cause they feel it is best for them 

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.

The sun's parallax would be 180 degrees, greater than which you can't get.  so a. would be your anwser 

Iwould say d. eye contact and body language because you aren’t using any spoken communication. hope this : )