Can anyone help me understand how to do this? Because to be real I do not know how to do it at all.

Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of a) oxygen b) helium c) methane d) carbon dioxide

Need will give 100 ! in no less than one hundred fifty words, explain why it is important for engineers to sketch designs and use them to clarify their designs to other people, giving at least three reasons.

Which is a factor that might lead a person to make a career choice for the wrong reasons?