What is the most likely reason for the decrease in hominin hairiness compared to apes?

Question

Quizplus · Accepted Answer

The decrease in hominin hairiness is most likely due to the need to regulate temperature and allow sweat to evaporate. As humans evolved to become bipedal and more active, a thick coat of hair would have become a hindrance to losing heat generated by physical activity. Sweating allowed hominins to release excess heat and reduce body temperature, but this would not have been as effective with a thick coat of hair. Therefore, the loss of hair allowed hominins to regulate their body temperature more effectively.

What Is the Most Likely Reason for the Decrease in Hominin