Which of the following is NOT an effect of urban sprawl?

There is an increase in tax revenue.

It creates a demand for new public services

Crime rates in densely-populated areas drop

There is a new demad for housing in suburbs.

The statement that is not an effect of urban sprawl is the third, Crime rates in densely-populated areas drop.

Explanation:

There are no data that correlates urban sprawling and crime rate's decrease.

All other statements, in the other hand, are explicit effects of urban sprawling: because new areas are becoming urbanized public services are demanded and tax revenues increases.

The public power has to build a whole new infrastructure to attend the necessities of the people who are moving to these spaces such as schools, housing, transportation, railroads etc.