Final answer:
All human groups relied on foraging or gathering-hunting as their subsistence strategy until around 10,000 years ago, a practice that involved hunting wild animals and gathering wild plants for survival.
Step-by-step explanation:
The subsistence strategy used by all human groups until 10,000 years ago was foraging, also known as gathering-hunting. This type of subsistence strategy includes hunting wild animals and gathering wild plants. It was the sole way of making a living for humans from the era of Homo erectus up until the agricultural practices started to emerge, which anthropologists estimate to have happened around 12,000 years ago. Gathering-hunting was a necessary adaptation for survival, allowing our ancestors to subsist on the natural resources available in their environment, such as fruits, nuts, berries, roots, and the meat of wild animals.