<span>President Polk ordered the commander of the U.S. Army in Texas, Zachary Taylor, to move his forces into the disputed area near the Rio Grande River. The river formed part of the border between Texas and Mexico.</span>
The answer for this question is: <span>emergent properties
</span><span>an emergent property is a collection of a complex system that organisms will achieve as we evolve.
</span>When we evolve, we tend to develop certain abilities that make us perform better compared to unevolved version of ourselves (in human, this development revolves around our increase in IQ)
The answer is <span>microeconomics
</span><span>microeconomics refers to the branch of economics that focused on observing the interactions between individuals and firms when they're competing to obtain and utilizing resources.
Natural disasters would increase the rarity of the resources and will tend to increase the price of goods and services in that area.</span>