Question

which of the following is the type of interaction between leeches and humans?
○ parasitism ○ predator-prey
○ commensalism ○ mutualism
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question 3 of 5

Explanation:

1. First, recall the definitions of each interaction type:

• Parasitism: One organism (parasite) benefits at the expense of another (host), causing harm to the host. Leeches feed on human blood, harming humans (host) while benefiting themselves (parasite).
• Predator - prey: Involves one organism killing and eating another. Leeches do not kill humans to eat them, so this is not it.
• Commensalism: One organism benefits, and the other is neither helped nor harmed. But leeches harm humans by taking blood, so this is incorrect.
• Mutualism: Both organisms benefit. Leeches benefit from human blood, but humans do not benefit from leeches in this interaction, so this is wrong.

Answer:

A. Parasitism