I. Choose the correct word or phrase to complete the passage

Urbanization is increasing rapidly in many countries. More and more people move to cities to look (1) ______ better job opportunities and higher living standards. As a result, urban areas are becoming more crowded, which leads (2) ______ serious problems such as traffic congestion, air pollution, and noise.
To deal with these issues, many cities are encouraging residents to adopt greener lifestyles. People are advised to use public transport instead (3) ______ private vehicles and reduce energy consumption at home. If citizens changed their daily habits, the environment (4) ______ be cleaner and healthier.
In addition, schools play an important role (5) ______ raising students’ awareness of environmental protection. By educating young people about green living, societies hope to reduce the negative effects of urbanization in the future.