Answer:
Sadness is caused when there is a strong emotional reaction to a particular object.
Sadness can sometimes lead to depression, but more commonly sadness can make you feel tired, angry, or stressed.
Explanation:
Parasitism bc the warbler's young are being displaced which means that the warblers are suffering harm through the loss of their young.
limbic system
Explanation:
center of emotional processing is the amygdala
Genetic. And it allows for more fish to be created and living freely