Which of the following statements, BEST describes the conditions that cause thunderstorms and tornadoes? a. Cool, moist air rises to meet cool, dry air.
b. Warm, moist air rises to meet cool, dry air.
c. Warm, dry air rises to meet cool, moist air.

developed and developing countriescountries are divided into two major categories by the united nations, which are developed countries and developing countries. the classification of countries is based on the economic status such as gdp, gnp, per capita income, industrialization, the standard of living, etc. developed countries refers to the soverign state, whose economy has highly progressed and possesses great technological infrastructure, as compared to other nations.