As sprawl increases in a city view available hint(s) as sprawl increases in a city general health is improved pollution decreases the need for cars increases less land is used per capita

the need for cars increases

Explanation:

The need to have a car increases because the city expands and the journeys become longer. However, the expansion comes with an increase in the number of population, which causes congestion in public and private transport. If there is an increase in the demand for transport and the number of public and private cars increases.

explanation:

"do a testcross with a homozygous recessive plant."