As a result of the persian wars of the 5th century b.c.
a)greece became part of the persian empire
b)spartan power in greece declined greatly
c)the persian empire was destroyed
d)the influence of athens increased in greece

Good Morning!
Leading the resistance in the victory against the Persians, the Athenians gained great influence among the Greek city-states. So the answer is:

d)The influence of Athens increased in Greece
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Overpopulation puts a tremendous strain on resources. If too many people live in a place with too few resources (food, water, etc.), there are many negative effects. The biggest concern is access to water. A lack of fresh water can lead to unsanitary living conditions, which can cause disease, infection and increased child and infant mortality. Additionally, overpopulation can lead to malnutrition and increased transmission of diseases. Even more disconcerting is the fact that overpopulation is a growing issue; by 2050, the projected population of the world is 9 billion, with the developed world comprising the majority of the population.