Why did Philip II need a navy to defeat the Greek city-states?

The city-states were surrounded by water.
Most city-states were located on islands.
Most city-states were located across the Aegean Sea.
The city-states had allies near the Mediterranean Sea.

uniform, random, and clumped.

explanation:

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disequilibrium means that either supply is greater than the demand for an available good, or that the demand for a product outstrips the available supply. it implies that the price for a is either too low creating large demand, or too high creating a large surplus of supply.