Volcanoes that are tall, steep, and made of both lava and volcanic material are volcanoes. tall, gradually sloped volcanoes made mostly of lava flow are volcanoes.

The next best alternative given up when making a choice is called the a. opportunity cost b. comparative advantage c. primary objective d. negative consequence select the best answer from the choices provided. a b c d

Acountry that is changing its economic focus from agriculture to industry has a economy. a. mixed b. command c. developing d. traditional (not d)

Which interaction between the atmosphere and biosphere takes place during plant respiration? plants use nitrogen and release oxygen into the atmosphere. plants use oxygen and release carbon dioxide into the atmosphere plants rely on available sunlight and release oxygen into the atmosphere. plants rely on mineral content in the ground and release carbon dioxide into the atmosphere.