what is parasitism

Parasitism is a type of ecological relationship in which one organism, known as the parasite, benefits from its association with another organism, known as the host, while causing harm to the host. The parasite relies on the host organism for resources such as food and shelter, often resulting in damage or even death to the host. Parasites can be found in various forms including bacteria, viruses, fungi, plants, and animals. Some examples of parasites are ticks, fleas, lice, tapeworms, and certain plants that obtain nutrients from other plants.