The southern united states experiences periodic occurrences of severe cold and drought conditions. which weather phenomenon most likely causes this and why? a. la niña, because the jet stream is displaced southwards b. la niña, because the jet stream is displaced northwards c. el niño, because of increased upwelling of cooler waters d. el niño, because of decreased upwelling of cooler waters

What was one effect of european influence on southeast asia?

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?

Technology has affected regional settlement patterns in what ways? choose all that apply. climatic improvement strategies have improved crop productivity. mechanized agricultural methods have improved agricultural productivity. participation in the global economy has increased urbanization. population shifts from urban to rural areas has increased as a result of petroleum production. settlement areas have increased as a result of improved water storage and delivery systems.