Since you didn't show the table, here is the table:Sample, Temp in Celsius, Salinity, Density
Sample A - 21, 34, 1.024
Sample B - 11, 35, 1.027
Sample C - 12, 34, 1.026
Sample D - 19, 35, 1.026
Sample E - 3, 35, 1.028 So the arrangement for this would be: A, B, C, D, E. Because the salt in the water makes water denser, so it will sink while the water with less salt won't be as thick, so it would skim on top.
A biome is defined as the large ecological area where the formation of plants and animals with common characteristics gather due to the similar climates. If I were an ecologist, and i will be determining whether an entire river and lake biome is being threatened by human activity, the indicator species that i might look for are the ones that have been introduced into the biome.