Criteria such as salinity, depth,and whether the water is flowing or standing are used by scientists to classify aquatic system.
Explanation:
Hydrologist and Oceanographer used to test salinity, depth, temperature of ocean water and whether the water is flowing or standing in case of large water mass or stagnant water body to classify aquatic system. To know the aquatic system very well one must have idea about the photic zone of the water i.e. up to which level sun rays can penetrate into the water.
In photic zone the phyto planktons and all the vegetative life of water mass do exist. Beyond this level plant life can't exit in dark zone. Likewise with increasing depth salinity of water increases, nature of water mass (stagnant or flowing) also have influence in classifying aquatic system.
Most likely a bad diet and lack of exercising to little.
I would go with A.
Hope i was able to help :)
The following situation would be an example of freedom of association:
C.) Homeowners in a local neighborhood deciding to schedule monthly potluck dinners.
Freedom of association is a voluntary informal gathering wherein one can choose to come and go as they please.
C Portugal , they began the large scale importation of negro slaves into the new world.
