A Predator.
Predation
When an organism interacts with other living things, good and bad things can happen. A bad thing such as, the one organism might feed off a bad energy with the organism meaning one animal might die or survive with terrible An environment is completely different. The organism has a choice to make. The environment might be too cold or even too hot! The organism has 2 choices to make, one, to fight the harsh weather and get used to it hopefully able to survive or make it out of the terrible conditions hoping to make it out alive. ~Hope this helps~
They each plant their young on another organism and let their young use the organism as a host for them to feed
If you count bacteria and viruses, a virus tends to feed off bacteria.
A parasite is an organism that feeds on (and may live inside, or be attached to) another organism without killing it (in comparison to a predator which kills and eats other organisms). The organism upon which a parasite feeds is known as the host.
Free-living flatworms are flatworms that live independently in their environment, rather than parasitizing another organism. They are typically found in freshwater or marine habitats and feed on microorganisms, small invertebrates, and organic matter. Examples include planarians and marine flatworms.
Feed, Breed, Die. Pretty much Well, bacteria are supposed to decompose dead animals.
Free-living bacteria, such as those found in soil or water, do not live inside another organism. Examples include species like Escherichia coli and Pseudomonas aeruginosa that exist independently in their environment without relying on a host for survival.
Predation is the type of relationship where one kind of organism feeds on another. A snake eating a mouse is an example of a predation relationship.
Organisms that feed on each other are called parasites. There is the host (the one that is getting used) and the parasite (the one who sucks the blood). Organisms like ticks are parasites, sucking on human or dog blood. (You have probably seen them on your arms/legs)
Fleas and ticks, and other paracites can usually feed of animals without killing them. I know this answer isn't good, but ain't it better than the last?
scavenging is an example of an eater-eaten relationship because animals who feed on the dead animals may be eaten by other live animals when they are dead....For Example; Vultures feed on dead animals but when the vulture is dead another live animal will feed on it and when that live animal becomes dead another animal will feed on its dead body and so on...