One proposed project to restore louisiana wetlands is to backfill canals that were built for access to and transportation of oil from the coastal area. why might scientists first want to build and study a model of their proposed object?

Scientists would probably want to model this first so they will identify the outcome instead of creating a large catastrophe. It wouldn't be an upright idea for scientists to begin a project without knowing if it will work, the consequence, and if it’s safe to do on the land. 

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.

the titanic would be the correct answer