Which of the following is a correct description of the earth’s physical structure? a. the earth’s physical structure is made of liquid metal. c. the earth’s physical structure is made of water. b. the earth’s physical structure is made of several spheres. d. the earth’s physical structure is made of several layers.

Match the type of region in column 1 to the example in column 2 functional region: functional formal perceptual example: the united states of america the slums of detroit the houston metropolitan area

20 brainliest for whoever answers correctly and answers all choose the statements that accurately describe china's "one child policy." china's "one child policy" began as soon as the communists came to power. the "one child policy" was meant to keep the population from reaching 700 million. the "one child policy" was meant to slow china's population growth. the "one child policy" began as a result of the country's war with japan. some people were allowed to have more than one child. the "one child policy" began in 1979. the "one child policy" was most enforced in urban areas. the "one child policy" ended at the start of 2016. china's population is current just under 1 billion people.

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.