<span>Scientists choose where are units of time began and ended based on major changes in life forms at certain times</span>
Answer:
In my opinion Alexander was Great, not only for his time, but in general in history.
Explanation:
Alexander the Great as history remembers him is one of the greatest generals and leaders not only of his time but in the history of humankind.
During his reign he created the largest Empire the world has seen until then. Not only that he created a vast empire, but he also managed to unify it through cultural means. He believed that the country he was ruling in should respect all differences and cultural diversity.
He was Great because his ideas were in front of his time, he was Great as a rule, he was great as a General.
I think is alternative a because that includes the earth
The levels of greenhouse gases in the atmosphere have been increasing due to the widespread burning of fossil fuels by the growing human populations.
A cold front is the transition zone where a cold air mass is replacing a warmer one, (They move more slowly than warm front's.) Others are Characteristics of cold front's and they move faster than warm.
Hope this helps<3
