Organisms and Populations — BIOLOGY STD 12 Science — Question

Mode of interaction between two species in which one species (parasite) depends on the other species (host) for food and shelter/one organism is benefitted, the other is harmed.
e.g. Human liver fluke/Malarial parasite/Cuscuta.
Co-evolution is the relationship between two interacting organisms where both organisms failed to survive in the absence of the other.
e.g. Fig and fig wasp/ophrys and bumble bee.