Final answer:
Evidence for the exploitation of savannah habitats by a lineage includes the savanna hypothesis, which is supported by tool use in chimpanzees, archaeological findings of hunting practices, and human-induced extinction events.
Step-by-step explanation:
The evidence we have that a lineage exploited savannah habitats is rooted in multiple studies and historical observations. The savanna hypothesis suggests that many human traits, such as upright bipedalism, evolved as adaptations to a savannah habitat. Several forms of evidence support this hypothesis, such as the presence of tool-assisted hunting in chimpanzees that live in such environments, the change in size of prey hunted by early humans indicating the exploitation of smaller animals as larger ones became scarce, and the use of fire by human ancestors which is believed to have originated in tropical savannas. Archaeological records such as fossilized spearheads, evidence of human-induced extinction events, and the historical dependency on both renewable and non-renewable resources provide additional substantiation for the exploitation of savannah habitats by ancestral human populations.