Harmful metabolic wastes from our body are removed by the biological process called:

Correct option is D

Correct Answer: (d) Excretion

Explanation:

·         Excretion is the biological process through which harmful metabolic wastes, such as urea, carbon dioxide, and excess salts, are removed from the body.

·         Organs like the kidneys, lungs, and skin play a vital role in excretion.

·         The kidneys filter blood to produce urine, the lungs expel carbon dioxide, and the skin removes waste through sweat.

Other Options:

• Defecation: This refers to the removal of undigested food and solid waste from the digestive system, not metabolic waste.
• Transportation: This is the movement of substances like nutrients and gases within the body, not waste removal.
• Secretion: This involves the release of useful substances like enzymes, hormones, or saliva, not the elimination of harmful wastes.