Answer:
For instance, when we feel threatened by something, the initial emotion is labeled “fear." That fear, by means of hormones, results in the production of fight-or-flight responsive feelings, allowing our body to react quickly and appropriately for its own self-preservation. This emotional reaction happens suddenly and unconsciously. Then, usually after an extremely short period of time, we become aware of those changes. We become aware of them only after responsive hormones have entered our bloodstream and we experience them as a feeling of being frightened or perhaps inferior. - Forbes Magazine Article
Explanation:
I hope this helps!
If you read each of these, or speak them, there is only one that suits the sentence correctly.
Go with the third one. Couldn't seems to fit pretty well there.
The herbivorous duck would be the primary consumer. In a food web, these are the creatures that directly eat plants and vegetation. Secondary and tertiary consumers, which would be the osprey and bald eagle in this case, are the creatures that directly eat the primary consumers.