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Which of the following statements about evolution of behaviour is correct?
Bacteria
Microscopic, single-celled organisms found everywhere in the environment, which can be beneficial, harmless, or pathogenic to humans and other life forms.
Foreign Substances
Substances that are not naturally found within an organism or system, often implying exposure to chemicals, toxins, or pathogens from external sources.
Stress
The experience of emotional or mental pressure due to tough or unfavorable conditions.
Physical Illness
Physical illness is a condition that impairs the normal functioning of the body, often characterized by specific symptoms and signs.
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