Grade levels
 8 - 10
 Contains
 10 pages, diagram of balance in the ecosystem, Miro tutorial
 subjects
 Structure of ecosystems | abiotic / biotic environmental factors | relationship between environmental factors and stress factors | human influence on natural ecosystems | balance of ecosystems | role of a parasite in an ecosystem | communities
 Description
 Parasitism and its role in the ecosystem are examined in more detail in this task, starting with identifying natural and unnatural stress factors. To help the students understand that natural stress factors are responsible for the balance in the ecosystem, they create a diagram showing the factor of food shortages and parasites. This makes the key role of parasites in the ecosystem clear. Finally, there is a discussion session on the topic of "Relevance of natural and unnatural stress factors in the ecosystem".