Answer:
Internal response; when a person is infected by a bacteria or virus, the immune system springs into action to fight against the infections. Geotropism and phototropism are dealing with plants and they way they grow, while fight or flight is a physiological reaction by the human body in stressful situations-- so they are incorrect.
Explanation:
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Answer:
The weather change as the earth warms because since,20th century due to human activities, particularly fossil-fuel burning which increases heat- trapping greenhouse gas levels in Earth's atmosphere.