Answer:
It's a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.
Explanation:
The answer would be D.
As for The other options, it cannot be A because there is no way we could know if they are exactly similar. B states they are dramatically different when there is obviously some similarity. C states that they are from the same time period, which is impossible as there is no way a layer of sedimentary rock can be the same age as current day mud. There are likely many layers above the studied area that can denote the age.
A weather maps an example of a Model :)
True not completly sure ;) have a great day
Answer:
not sure but i think it is B
Explanation:
B increased mobility and expanding urban areas
