Opec began an oil embargo of the united states
A. Spanish conquistadors bring their horses with them across the Atlantic. Some horses escape or swim to shore after a ship sinks. The Plains Indians become expert horsemen and buffalo hunters.
This was certainly not intentional since hardly the conquistadors would want their enemies to be stronger.
B. B. Rats are aboard European ships coming to the Americas. The rats spread disease and hunt unknown numbers of smaller animals to extinction.
This is hardly intentional. Rats were almost unavoidable back then and the Europeans just did not care much about them. They weren't thinking about how the rats would cause trouble in the Americas. They were "just rats".
So the only intentional one is:
C. Columbus brought pigs to the Americas on his second voyage. The pigs provided a valuable source of food for a growing population.
Columbus brought pigs for them to serve as food eventually and so they did.
cause: 70,000 known members of the communist party in America
Effect : Attorney general appointed J. Edgar Hoover to help hunt down suspected communist to socialist and anarchist
Explanation:
from after Reconstruction until the 1990s, the Democratic Party dominated Texas politics. In a reversal of alignments, since the late 1960s the Republican Party has grown more prominent. By the 1990s, it became the state's dominant political party and remains to this day.
Answer:
Explanation:
The technique use by the Zapotec to farm steep mountain terrain was through canal irrigation.
The Zapotecs make use of the water from small streams which caused them to be able to provide water to Monte Albán which was located 400 meters above the valley floor. Even after many years the Archeologist found the remains of minor irrigation system such as Dam and a canal on the south eastern parts of the mountain.
