Why did so many families in brazil need their children to work instead of attend school in the 1990

Adeveloping nation's economy is based on a developed nation's economy is based on stay tuned- i may post some more questions from my study guide : )

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

Which barrier to economic development is shown in the following examples?