Astream of river that runs into another stream or river

Which of teh following would explain the importance of the trans-siberian railroad to russia's economy? (schoology test)

The chemical or mechanical process by which rock is gradually broken down eventually becoming soil

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.