Final answer:
The Turkana are nomadic pastoralists with a semi-nomadic lifestyle influenced by the search for water and pasture for their livestock, whereas the Rendille are also pastoralists but have a more sedentary settlement pattern, moving less frequently and establishing more permanent settlements.
Step-by-step explanation:
The Turkana and Rendille are two ethnic groups in Kenya with differing settlement patterns due to their distinct ways of life and adaptations to the environment. The Turkana, residing predominantly in the northwestern part of Kenya, are traditionally nomadic pastoralists. Their settlement pattern is largely influenced by the need for their livestock to access water and pasture, leading to a semi-nomadic lifestyle where they move from one place to another, influenced by seasonal changes. In contrast, the Rendille, who live in the northern part of Kenya, also have a pastoralist way of life but are known for a slightly more sedentary settlement pattern. They tend to establish more permanent settlements near water sources or wells and only move when absolutely necessary, such as in severe drought conditions.