Identify the correctly matched pair:

(i) Amensalism – A relationship where one species is harmed while the other remains unaffected. Example: Penicillium fungus secretes penicillin, which kills bacteria, but the fungus itself is not affected. (ii) Parasitism – A relationship where one species (parasite) benefits while the other (host) is harmed. Example: Tapeworms in human intestines.\ (iii) Commensalism – A relationship where one species benefits while the other is unaffected. Example: Cattle egrets feeding on insects stirred up by grazing cattle. (iv) Mutualism – A relationship where both species benefit. Example: Pollination by bees, where bees get nectar and plants get pollinated.