The interaction between living organisms in which one of the species benefits at the expense of the other is -
Correct Answer : b ) ParasitismExplanation :
Commensalism: The relationship between the two species in which one species benefit while the other is not affected. E.g., Remora fish and shark
Parasitism: The interaction between living organisms in which one of the species benefit at the expense of the other. E.g. Tape worm and human
Ammensalism: It is an interaction between two organisms where one is destroyed or harmed whole the other is not affected. E.g. An example is a black walnut, which secretes juglone, a substance that destroys many herbaceous plants within its root zone.
Mutualism: The symbiotic relationship between the two species, where both species benefit from each other. E.g. Algae and Fungi
Hence, B is the correct answer.