Step 1: Understanding division of labour in tribal societies.
In tribal societies, the division of labour is typically based on age and sex. Different age groups and genders perform specific roles and tasks, often guided by traditional norms. For example, men might engage in hunting or heavy physical work, while women are responsible for gathering food or domestic duties. Similarly, tasks might vary for younger or older individuals.
Step 2: Conclusion.
Thus, the division of labour in tribal societies is based on both age and sex, corresponding to option (C).