Final answer:
The ancestral group to anatomically modern humans is Homo erectus, which originated in Africa and was the precursor to Homo sapiens sapiens.
Step-by-step explanation:
The group ancestral to anatomically modern humans (AMHs) is Homo erectus. This species of human is thought to have arisen in Africa and is known for being one of the earliest humans to exhibit a number of features similar to AMHs. They were responsible for the first major wave of migration out of Africa around 1.5 million years ago. As indicated by fossil evidence, it is believed that anatomically modern humans, or Homo sapiens sapiens, emerged from Homo erectus populations in Africa and later migrated out of Africa in a second significant migration wave around 100,000 years ago, eventually replacing other Homo species across the globe.