1) Development means different things to different people based on their circumstances and goals. These goals can include income, education, freedom, and access to resources.
2) Countries are often compared based on development indicators like per capita income, health outcomes, education levels, and access to public facilities and services.
3) Development must be sustainable and not degrade the environment or exhaust natural resources, otherwise gains will not last. Balancing various development needs requires cooperation across disciplines and societies.