Question 5

In case of eutrophication, there is more phytoplankton and filamentous algae, which leads to more dead material on the bottom which breaks down and gives oxygen-poor bottoms, which means. .. (One or more answers are correct)

A: formation of hydrogen sulfide in sediments

B: uptake of phosphorus in sediments

c:loss of phosphorus from sediments

D: departure of carbon dioxide from sediments