Representatives. The United States is divided into 435 congressional districts â 36 in Texas â each with a population of about 710,000 individuals. Each district elects a representative to the House for a two-year term. Representatives are also called congressmen/congresswomen.
Confronting the Causes of Urban Sprawl. Causes of urban sprawl include: 1  Consumer and real estate industry preference for large houses and large lawns.  Dislike of housing density by a vocal and often uninformed minority that equates density with public housing, undesirable apartment complexes and rental tenants, and traffic and noise.
Habitat fragmentation can be caused by geological processes that slowly alter the layout of the physical environment (suspected of being one of the major causes of speciation), or by human activity such as land conversion, which can alter the environment much faster and causes extinctions of many species.