They established 20 provinces each with a Persian governor responsible to the king. They also left the local governments in control of their cities/tribes/principalities under supervision of the governors.
By retaining local government and having Persian provincial governors to maintain control and internal and external security, and to collect modest taxes to pay for it.
Not being able to govern/control the area that you have conquered and thus, losing control over it
They established a provincial governor - a proconsul - to control the area; the Persians divided their empire into 20 provinces (satrapies) controlled by a Persian governor (satrap). The Romans similarly appointed a governor (procunsul) of each of their new territories to similarly rule, collect taxes, and handle internal and external security.
their large area of land
The Aegean Sea littoral.
In large part it would depend on the area you're in. If people, on average, have a large area of land you should be able to get a good gain from it. In smaller area, the lifting needed will generally be small as well.
Example sentence - We were able to enclose an area large enough to accommodate several horses.
it will not be able to take in enough nutrients or get rid of wastes
Because the Germans were brilliant military planners.
A phenomenon that causes great damage to a lot of people or a large area over which man has little or no control.
Medusa did not control any area. She is not a goddess. If she was, she would control something.
A large area of water is an ocean.