Answer:
One justification: "Mexico attacked us first." In April of 1846, Mexican cavalry attacked U.S. soldiers in a disputed area and killed about a dozen. This justified America's declaration of war in some's eyes.
Argument against: "Mexico only attacked us because we goaded them into it." Opponents to war said that Polk intentionally placed U.S. soldiers in the disputed zone so that Mexico would attack them.
1st bullet ex: Man pays for things. Woman gets things.
Humans gave up razor-sharp claws, fangs, sense and instincts in favor of intelligence. This brain-power has enabled humans to make the ultimate adaptation; that of making the environment adapt to us. We have domesticated crops and livestock, we irrigate, we wear clothes, build shelters, air-condition or heat our homes.
C so the air goes through easier, is what I think