Which of the following is an example of Aztec achievements in astronomy? A. The development of the concept of zero.
B. The use of chinampas for agriculture.
C. The development of a writing system.
D. The creation of a 365 day calendar.

What happened right after the battle of concord ?

Iam a word that means to bring to fields and crops

Plz me on september 17, 1860to the union and confederate army’s fought the in maryland. it was one of the bloodiest battles in the civil war. a. battle of the seven pines. b. battle of antietam c. first battle of bull run. d. second battle of bull run.