There was a large number of dead fish drifting towards shore. Many dead birds with sticky, black coating feathers could also be seen there. A/An ______ might have occurred nearby.
B Volcanic eruption
C Oil spill
Ans is C because due to oil spill fishes die because it happens in water. Also, aquatic birds get covered with black coating because of that they can't breathe and they die.
answer is B because Oil spill is the condition when mineral oil or petroleum oil being carried on a ship gets spilled in the sea due to some reason. This causes death of aquatic organisms. Oil gets coated on feathers of aquatic birds making them unable to fly and to regulate their body temperatures. This causes death of the birds.