B...............................
There are several processes used to explain the removal of dirts or contaminants from surface, but the general name is called Cleaning
Cleaning is an umbrella name that involves the removal of visible soils mater from surfaces, there are other types of cleaning that involves the removal of non-visible matter from surface too e.g sterilisation.
Sterilisation refers to specific action taken to reduce the hazard posed by such contaminants, as opposed to general cleaning.
Learn more about cleaning here:
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B. Have a safe way to get home.
Red tide is the term mainly used that are the main reason for higher number of fish outbreak.
Explanation:
Red tide is a phenomena that deals with huge growth of algae ( single-celled) in the ocean water , as a result it discolors the water. Scientists say that in the last few decades there have been huge increase in toxic as well as harmful algae as a result marine animals are dying .
Dead and rotten fish can be seen on the beaches, dead whales can be seen, shale fish harvesting has been reduced. Due to this red tide fishes are dying more, hence scientists are saying we are going to see large number of fish outbreak.