Final answer:
The recommended position and work surface for a 5-year-old child with mild developmental delay and proximal upper extremity weakness who uses a palmar grasp when holding a pencil during prewriting activities would be sitting on a low stool with a slanted writing surface.
Step-by-step explanation:
The recommended position and work surface for a 5-year-old child with mild developmental delay and proximal upper extremity weakness who uses a palmar grasp when holding a pencil during prewriting activities would be sitting on a low stool with a slanted writing surface (option b). This position allows for better upper extremity alignment and promotes a functional pencil grasp. The slanted writing surface helps to improve wrist extension and control, which are important for efficient handwriting skills.