heled air and answer the questions that follow. Gas Proportion of gases in different air samples (%) Exhaled air Inhaled air At rest During exercise 0,04 4 9 Carbon dioxide Oxygen 21 17 12 Nitrogen 78 78 78 1 Draw a bar graph to represent the exhaled air. (7) 2 Name ONE common gas, not shown in the table, which would most like ore concentrated in exhaled air than in inhaled air. (1)​

the answer you are looking for is the united states forest service.

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the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers

answer; lower are;