Question

an environmental scientist is studying how las vegas transformed from desert to major city in 100 years. this example best demonstrates which concept about environmental factors? urban development always improves local environmental conditions desert climates are naturally unstable and change frequently natural selection occurs rapidly in desert environments human activities can dramatically alter environmental conditions within relative short time periods

Explanation:

Las Vegas' transformation from desert to major city in 100 years shows human - built infrastructure, water management, and other human activities have greatly changed the environment. Urban development doesn't always improve local environment, desert climates aren't the focus here, and natural selection isn't relevant to this urbanization example.

Answer:

Human activities can dramatically alter environmental conditions within relatively short time periods