Which pair of body systems control and coordinate the cells that make up the organism?
a. nervous and endocrine
b. digestive and circulatory
c. reproductive and muscular
d. respiratory and excretory

the pair of body systems that control and coordinate

A.nervous and endocrine

the growing interconnectedness of the world through communication, trade, and the exchange of ideas is an important theme in the history of the 20th and 21st centuries.

explanation:

these civilizations were located around fertile rivers, where they could produce an abundance of crops