The posts of Novgorod and Kiev were founded in what would later become Russia during the 400's and 500's. These became a prominent centers. A. military

B. travel

C. trading​

Hey i don’t know answer

Answergranulation;

5×^2+20-15 or -(5x^2-20+15)

Mexico has a host of environmental problems, including significant chemicalpollution  from factory discharges and waste dumping, but the main threat to itsbiodiversity  probably stems from  deforestation  and other natural habitat losses. forest habitat is lost for a number of reasons