Explain this idea, A reliable measurement is not always valid, yet a valid measurement is always reliable.

hey you do know that you didn't upload a file or picture cause we don't know what you are talking about the monster.

"urban sprawl, the spreading of large developments of housing and shopping areas around a city’s center, has many negative cultural and environmental effects. " (from your link)

so, your answer is: it has a negative effect on the environment, otherwise known as c~hope this mate. 

you did not give us a excerpt to read or any statements to choose from so we can not know the right answer be more detailed when asking your question