I think the answer could be B or D?
Answer:
d) by the language they speak
Explanation:
Most of the Native American tribes are grouped based on their language, thus using the linguistics as a method for creating connections between the groups. The linguistic groups by which the Native American tribes have been divided (specifically in North America) are:
- Algic; being the most dispersed of all, occupying the central and big portions of the eastern part of the continent.
- Iroquoian; occupying areas of the eastern part of the continent.
- Muskogan; being spoken in the southeastern part of what is now the United States.
- Siouan; mostly being represented in the central Great Plains region, with small enclave in the eastern coast as well.
- Uto-Aztecan; occupying the majority of the western and southwestern parts of the US, as well as small enclaves in Mexico.
- Athabaskan; being represented in the southwestern part of the US and northernmost part of Mexico.
- Salishan; a smaller linguistic group occupying the central western coastal region of the continent.
- Eskimo-Aleut; dispersed along the northern coastline of the continent and southern Greenland.
- Mayan; being spoken in the southern portions of Mexico.
There are also other linguistic groups, but they have much less speakers and occupy much smaller territories.
Coal-burning factories and increased automobile usage has caused the greatest increase in "<span>A) air pollution," since in fact coal when burned is one of the worst pollutants. </span>
