All of the following occurred due to the invention of the railroad except a. transportation costs increased b. agricultural activities moved further west c. transportation times decreased d. agricultural products were shipped longer distances

After considering options, a student using the problem-solving process should next

Which statements describe sustainable development? multiple answer choice -fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them. -sustainable development is development that is designed to improve the economic conditions in less-developed countries. -sustainable development is mainly a regional issue. -sustainable development means water is used at a rate that won't reduce the amount available for future use. - sustainable development policies only need to be concerned with environmental protection. - trees cannot be cut down faster than the number that will be replaced by new growth.

Describe the four major spheres of the earth system; identify the parts of the earth they each represent. explain what is meant by the "earth system."