Question

High concentrations of toxic heavy metals in estuaries are most likely found in the select one:
a. water of the estuary
b. air above the estuary
c. estuary sediments
d. water of the adjacent ocean
e. air above adjacent land

Answer 1

The correct answer is c. estuary sediments.

Estuaries are under threat from human activities and they concentrate materials such as pollutants and sediments. For example, estuaries receive a high heavy-metal input from industries. Those heavy metals are most often found in the estuarine organisms and in sediments.