Protists with complex bodies covered with hairlike structures known as cilia are calleda)amoebasb) parameciumc) dinoflagellatesd) euglenoids

B. Protists with complex bodies covered with cilia are called Paramecium.

Because some people pollute water ans waste it

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil.