which of the following statements is  true? a. the nitrogen cycle is the most important cycle for life. b.the oxygen cycle is the least important cycle for life. c.life can be sustained without any of the cycles for life present. d.all cycles of matter are equally important for life to be sustained.    select the best answer from the choices provided

The pacific islands that lie along tectonic plates may have volcanic activity are uninhabited may not have agricultural economies are located in the tasman sea

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.

Answer this asap. why did the americans go to china? a. trading b. exploration c. land d. live stock