Reason , independence , natural environments
Answer: 
Explanation:
Given
A Planet is moving at a rate of 3 cm/year
distance between planets is 1500 km
and 1 km=1000 m
1 m=100 cm
No. of years required to cover 1500 km=
Answer: The name is thought to derive from bav-il or bav-ilim which, in the Akkadian language of the time, meant 'Gate of God' or 'Gate of the Gods' and 'Babylon' coming from Greek