- Predator is an organism that catches and kills other organism for food.
Explanation:
In predation, one organism called as predator captures, kills and eats another organism, called as prey. Predators are generally carnivorous animals but some herbivorous which destroy whole plants/ seeds are also called predators.
In parasitism, one organism obtains nourishment from another organism, called as host.
In amensalism, one species is inhibited, while other species is neither benefited nor inhibited. Without deriving many benefits, one organism inhibits another organism by secreting allochemics. The phenomenon is called as antibiosis.