Harmful metabolic wastes from our body are removed by the biological process called:
excretion
The correct answer is option 2 i.e. excretion.
Excretion is the biological process by which harmful metabolic wastes—such as urea, carbon dioxide, and excess salts—are removed from the body. This is essential to maintain internal chemical balance and prevent toxic buildup. In humans, excretory organs include the kidneys, lungs, and skin.
Other Options Explained:
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Transportation: Refers to the movement of substances like nutrients and oxygen, not waste removal.
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Defection (correct term: defecation): Eliminates undigested food via the anus, not metabolic waste.
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Secretion: Involves the release of useful substances like enzymes or hormones, not waste.
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