What is the national bird of Sudan

In a economy individuals answer the three basic and the central authority or leaders have little say in the economy.

Which continents lie only in the northern hemisphere

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.