What is the central idea of the article "A proposed mine in Alaska may bring jobs, but threaten a way of life?"

Because its government strictly controls its economy, north korea has a economy. a. command b. mixed c. traditional d. free market

Which outcome is not caused by gravitational forcea. gas and dust come together to form a planet b. planets orbit a star c. two atoms come together to form a molecule d. stars cluster to form a galaxy

What are the percentages of the large near earth asteroids that we have found so far?