Concept:Characteristics that develop during an organism's lifetime due to use, exercise, or environment are called acquired characteristics.
Explanation:Features such as large muscles from wrestling, calluses from hard work, or scars are not present at birth.
They are developed after birth as a result of physical activity, training, or environmental pressure.
These changes occur in somatic (body) cells, not in the reproductive cells, so they are not transferred to the offspring.
They are not caused by changes in the DNA sequence (mutation) and are not inherited from parents.
Hence, the wrestler’s big muscles illustrate an acquired characteristic.
Answer:A. acquired characteristics