Jet streams are fast-moving streams of air high above Earth's surface. A divergence or convergence in the jet stream above a hig
h- or low-pressure center can drive the actions of these pressure centers. If the air in the jet stream is converging or diverging faster than the air at the surface is moving out or in, the driving force of the jet stream is compensated by an increase in surface winds.A jet stream generally diverges above a low-pressure (warm) center. However, at Earth's surface, air converges at a low-pressure center. If the divergence of the jet stream is greater than the convergence of air at the surface low-pressure center below it, what will happen to the surface winds?
The answer is D i think this because the supply and demand means that if there is more demand for something they will need to supply it more which would mean the opium farming would go up!
The most likely cause is the activity of the El Niño phenomenon, which causes changes in air masses and temperatures in the region, including Australia.