A paramecium, like the one pictured here, must continuously use its contractile vacuole to expel excess water from its cell in order to survive. This means that the paramecium's natural environment (extra cellular fluid) is hypotonic
hypertonic
isotonic

Hypotonic.

In hypotonic environment, the water moving into the Paramecium cell by osmosis. Paramecium cells regulate water through special organelles which are known as contractile vacuoles. Paramecium is a freshwater organism, which means a hypotonic environment is its typical ambience.

The answer is magnitude measures the effects of an earthquake on the area , while the intensity measures the strength of an earthquake.