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Step 2: List Candidate Causes

 This image is a drawing of a caddisfly larva in its case. Caddisflies are aquatic insects that are used by biologists to monitor the environmental quality of streams.


 At the conclusion of Step 2, you should have the following products (example products from step 2):

These products are used to focus assembly and analysis of data in Steps 3 and 4.


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