Which habitat is least suitable for Homo habilis?

Homo habilis is thought to have primarily occupied habitats that provided adequate resources for survival, such as access to food and materials for tool-making. Wooded areas and savannahs would have been suitable habitats as they offered diverse food options, including fruits, nuts, and small game, and were also conducive to the types of activities that characterized early hominin life, such as tool use and gathering.

In contrast, mountainous regions present several challenges that would have made them less suitable for Homo habilis. These challenges include the scarcity of food resources, the difficulty of mobility in rugged terrains, and potentially harsher climatic conditions. The adaptations of Homo habilis, including their physical structure and foraging behaviors, were not optimized for the demanding conditions and resource limitations that typically characterize mountainous habitats. Therefore, coastal environments, while possibly providing some resources, still lack the environmental features where Homo habilis would thrive compared to the savannahs and wooded areas, making mountainous regions the least suitable option.