What are the positive and negative of building a dam

What are the characteristics of living things

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.

Does anyone know what the schooling version of sos mean? example