Answer:
The word pneumonia has the root pneumon-, meaning lung or air. combining vowel. A combining vowel joins a root to another root or a root to a suffix.
Explanation:
I got it from the internet. Sorry it it's wrong
Railroads brought crops and food to cities in the East, and settlers to farms in the Great Plains
Answer:
D. OPEC actions
Explanation:
The downfall of the US oil industry in the 1980s was caused by a reduced demand for oil caused by the energy crises of the 70s and with this reduced demand, there became an oil glut, because the production was also increased.
Therefore, this downfall of the oil industry in America in the 1980s was caused by increase in oil prices by OPEC (Organisation of Petroleum Exporting Countries).
