Given a scientific passage and an answer, generate a question for the given answer.

[Q]: Passage: Skeletal Muscles. Skeletal muscles enable the body to move. Answer: move
[A]: What do skeletal muscles enable the body to do?

[Q]: Passage: Soil is a precious resource. It allows us to grow food and the materials we use to make everything from the shirt you have on to the medicine you took this morning. Soil is made up of small pieces of rock that have broken down over hundreds, if not thousands, of years. Soil is also partly made up of the remains of plants and animals, and is home to many organisms, from earthworms to ants. But soil can be damaged by unsustainable farming practices and clear-cut logging. In this chapter, you will learn how soil forms, what it contains, and how to protect it. Answer: soil
[A]: What precious resource allows us to grow food as well as materials we turn into clothing and medicine?

[Q]: Passage: It may be logical to assume that the electrolysis of aqueous sodium chloride, called brine , would yield the same result through the same reactions as the process in molten NaCl. However, the reduction reaction that occurs at the cathode does not produce sodium metal because the water is reduced instead. This is because the reduction potential for water is only -0.83 V compared to -2.71 V for the reduction of sodium ions. This makes the reduction of water preferable because its reduction potential is less negative. Chlorine gas is still produced at the anode, just as in the electrolysis of molten NaCl. Answer: at the anode
[A]:
Where is chlorine gas produced?