Living Partnerships Multiple Choices

Koi interact with many different organisms in their environment, and this passage explores some of those relationships. Readers learn how cleaner fish or other small organisms may remove parasites or dead material, how aquatic plants provide shade and shelter, and how parasites can harm koi by feeding on their bodies. The passage also introduces examples of commensalism, parasitism, and other ecological connections, helping students understand that koi are part of a much larger web of life.

This worksheet gives students strong practice comparing ecological relationships and deciding how each organism is affected. Vocabulary such as commensalism, parasitism, parasite, mutualism, and ecosystem becomes easier to understand when tied to specific examples. Students also strengthen classification and reasoning skills by determining who benefits, who is harmed, and who remains unaffected in each interaction.