Final answer:
The statement regarding cultural practices being 'proximal units of human experience' and crucial for understanding cultural roles in development is true, as they encompass the vast elements of human interaction and societal norms.
Step-by-step explanation:
The statement that cultural practices are referred to in the chapter as 'proximal units of human experience' and constitute a crucial point for understanding the role of culture in development is true. Culture encompasses a wide range of human activities and ideas, including values, social relationships, technology, daily behaviors, and deeply held beliefs. It is through these various components of culture that individuals interact with and experience the world. Cultural practices are thus central to how culture influences development, shaping individual and collective ideas, behavior, and social organization.