Parasites
Parasite (not sure though)
An organism that lives on or in a host and harms it is usually called a parasite. When the relationship mutually beneficial instead of harmful, it is called a symbiote.
A host is an organism that the parasite lives on. In other words the parasite may use the host's resources in a negative way. For example: A tick living off the blood of a human. The tick is the parasite and the human is the host. The tick lives off the blood of the human.
parasite is the organism that lives on other organism without any benefit to the host.
An external parasite is an organism that lives on another organism. The external parasite depends on its host for food and shelter while the host is usually harmed.
Parasite
A host organism provides a habitat for a parasite, allowing it to live, feed, and reproduce at the expense of the host's own resources and well-being. The relationship between a parasite and its host is often harmful to the host organism.
In science, a parasite is an organism that lives in or on another organism (called the host) and benefits at the host's expense. Parasites can cause harm to the host by taking nutrients, causing disease, or even leading to death.
Living at the others expense would be a parasite
A parasite is an organism that lives on or inside another organism, known as the host, and relies on the host for its survival. Parasites harm the host by feeding on its nutrients, tissues, or blood, which can weaken the host, cause disease, and even lead to death in severe cases.
The host is the organism for which a parasite lives off of.
A true parasite is an organism that lives on or in a host organism and derives nutrients from the host, often at the expense of the host's health. True parasites are dependent on the host for survival and reproduce within or on the host organism.