Coins were developed as a medium of exchange because other items like cows, grain, and land were more difficult to move from place to place.
a. true
b. false

Letter a, because when there are unlike charges they will always attract to each other.

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

Caused conformity rates to go down. apex ; )

Hello,your answer would be iron! plz mark me brainliest! hope this !