<span>Across nearly seven million years, the human brain has tripled in size, with most of this growth occurring in the past two million years.</span>
Historical is the correct answer :)
Answer:
A ground-fault occurs when there is a break in the low-resistance grounding path from a tool or electrical system. The electrical current may then take an alternative path to the ground through the user, resulting in serious injuries or death. ... The GFCI is rated to trip quickly enough to prevent an electrical incident.
Two problems would be overcrowding which could potentially result in rapid disease outbreak and lack of resources to go around to everyone that inhabits the urban area
two opportunities would be an opportunity for job specialization and an opportunity for fleeing of racial persecution as their is lots of diversity in urban areas
