Question

The relationship that exists when an organism lives in or on another organism and feeds off that organism is called __________.

Answer 1

Answer: It is called Parasitism.

Step-by-step explanation:

Parasitism is symbiotic relationship where an organisms lives in or on it's host thereby feeding and causing harm on it host. Examples of such relationship is parasites like roundworm, ticks, fleas that feed on humans and cause harm.