What two forces are balanced when a system is in isostasy

Downwards gravity and buoyant force.

Explanation:

The word isos and Stacy are derived from the Greek word and they mean the standstill and are in balance and is a state of the gravitational equilibrium between the earth crusts. And this concept explains the occurrence of the variation in the heights of the earth's crust landmass and it's said to be in equilibrium when a certain area of the surface reaches that state. It's an important way to explain the negative feedback mechanism of the system.

When a system is in isostasy, downward gravity and upward bouyancy are balanced 

The answer is b or dmost likely bhope it

Master planned communities outside of chicago. note: population density means people living in an area per square mile. chicago, an urban and highly populated area has a much more higher density than a desert, amish community, settlement, or nomadic region.