An urban area is characterized by
a) a dense human population
b)farm land
c)highways
d)public transportation

Option (A) is the correct answer.

Explanation:

An urban area is an area which is developed and it is a place where people can get almost all the things of their need easily.

Therefore, more an more people would like to live in an urban area as there will be more resources which can make people's work easy.

Hence, we can conclude that out of the given options an urban area is characterized by a dense human population.