Predation and parasitism are examples of food relationships between individuals, the similarity is that one organism uses the other (waste products) as food. Differences: predation is a way of obtaining food and nutrition of animals, in which they catch, kill and eat other animals, and parasitism is a way of feeding due to the nutrients of another organism (host), and the latter does not die from this, but feels depressed .
Unlike predation, when attacked by a parasite, the host does not die immediately, but experiences oppression (often for a long time). In other words, the parasite exhausts, but does not destroy the host, because the life of the host ensures its existence. Thus, parasitism can be considered as a weakened form of predation. In nature, there are often such interactions that can be called transitional from predation to parasitism: for example, mosquitoes and leeches, sucking blood from mammals.
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