Lol when moderators know a high-rank person giving out free points, they start spamming

Where the main factor that enabled the growth of cities and civilizations was the existence of

Mengapakah wujudnya perbezaan tanggapan terhadap sumber?

All of the following are reasons why deserts extremely susceptible to wind erosion except a. they lack major root systems b. they contain thin, dry soil c. they have very few plants and trees d. they are extremely hot and lack water