All planetary nebula leave behind black holes as remnants. a. true b. false

17. the soil erosion pictured here is the result of what? a. harvesting renewable resources at a rate greater than the sustainable yield b. a mudslide caused by excessive rains c. harvesting renewable resources at a rate lower than the sustainable yield d. the transition between geologic eras and eons

The middle east links which two continents? ●asia and europe●europ and africa●africa and asia●africa and australia

How can studying economics us make better choices about how to use scare resources