Why did slave traders seek out young healthy individuals as slaves?

Slave traders sought out young, healthy individuals because they represented the greatest potential for productivity and economic return. Younger slaves could work longer, often for several decades, compared to older individuals who might be closer to death or less capable of sustaining hard labor. Additionally, healthy individuals could withstand the harsh conditions of transportation and labor, ensuring a higher survival rate and profitability for traders. Overall, young and robust slaves were viewed as valuable assets in the brutal economy of slavery.