One of the main ways that humans can cause a desert to appear where one did not exist before is by a. terracing b. crop rotation c. building houses d. mismanagement

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Option D, mismanagement.

If the land is properly looked after such as through proper agricultural practices such as terracing and crop rotation, it will not cause deserts. Building houses will not cause desertification as seen by urban areas.

Explanation:

where is the scientific experiment?

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.