Answer:
i think farming but im a dumb american
Explanation:
The center of earth is called the core. It is made up of iron, nickel, and more. It's sturdy, like metal.
Do you have any ideas or choices all i have here is this info that i typed i had this question before do not know if that will help tho. The Erie Canal was important to Chicago's growth in the 1830s, because
the Erie Canal gave direct water access from the East Coast through the
Great Lakes to Chicago. Another important development was the opening
in 1848 of the Illinois and Michigan Canal that connected the Chicago
River (and hence Lake Michigan) to the Mississippi River. But after
1850 or so, the most important reason for Chicago's growth was its
development as a rail/ship nexus, joining railroad traffic from Iowa and
points west, as well as Missouri, Kentucky and points south, and the
Great Lakes, which connected to Wisconsin, Minnesota, Michigan,
Pennsylvania, New York, and through the St. Lawrence Seaway New England
and Europe.
Answer:
1) d. oxygen
2) d. deforestation
3) a. nuclear power
4) a. paleoclimatology
Explanation:
1) d. oxygen
option d is correct because above three options are green house gas.
2) d. deforestation
deforestation does not fit the pattern because deforestation is the phenomenon which is caused by human but rest option are natural.
3) a. nuclear power
rest options are natural resources coal, petroleum and natural gas are extracted from nature.
4) a. paleoclimatology
paleoclimatology is the study of change of climate where as rest options are effect of climate change.