Im not sure but if you think of it, the one that you didn't put any salt is a independent variable because it doesn't really rely on anything it doesn't have salt. The Dependent variable would be the 2nd and the 3rd cup because it doesn't have much salt but the 4th cup has lots of salt so its basically controlled. Hope it helps !
Drinking water might help keep the kidneys in homeostasis.
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5. pauk snelgrove states that oceans cobtribute significantly to not only sustaining life on earth but they are play a crucial part in nutrient
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An invasive species thrives in its new ecosystem and out-competes native species. So, some factors are dominance, environment, predators, and resource availability.
