The best option in terms of El Nino would be "<span>the cyclical warming of the Pacific Ocean near the equator," since this weather event is "expected" practically at the same time every year. </span>
Answer:
Louisiana Purchase, Texas Annexation, the Mexican Cession, the Erie Canal, the Homestead Act, the transcontinental railroad and the California Gold Rush are some examples of how the US started expanding its territory in the 1800s.
Explanation:
All of these statements are correct.
I looked, I can't answer this without a pic of some artical