Final answer:
The loss of body hair in hominids as they evolved is most likely due to the need for thermoregulation and the control of parasites on the body. Humans lost most of their body hair about a million years ago, which enabled them to better cope with the heat of the savanna. It took another 830,000 years for humans to start wearing clothes.
Step-by-step explanation:
The loss of body hair in hominids as they evolved is most likely due to the need for thermoregulation and the control of parasites on the body. Living in the heat of the savanna, humans needed a cooling mechanism to enable them to be better hunters, so they lost most of their body hair about a million years ago. Another theory suggests that this adaptation helped control parasites on the body. It was not until about 170,000 to 190,000 years ago that humans started wearing clothes, which provided further protection from the environment.