In the emotional, facial, memory, motor, social, spatial,
and verbal domains cerebral cortex abstracting thinking and decision making part
of the brain we can see frontal lobes of the cortex - higher order thinking and
good judgment impairment here; get them drunk and observe their social
judgment.
Energy and matter characterize both physical and biological systems. These systems are defined both by the types of energy and matter they contain and by how that matter and energy move through and between systems. ... This means that energy and matter can change forms but cannot be created or destroyed.
There are many reasons to why slaves were essential in the colonial economy:
Slaves were generally used more in the south, because large plantations were found there, which meant that the need for large amounts of workers.
Slaves provided cheap labors, and as they were not "citizens" of the US, they were not allowed their rights.
Slaves were also relatively easy to buy and replace, however, their survival rates were not that good after they traveled long distance.
etc.
hope this helps
I believe the correct answer is acid rain.