Lifespan Development

• Ergonomic Features of Modular Kitchens:
• Modular Kitchen Components:
• modern modular kitchen consists of standardized prefabricated cabinet units engineered for maximum ergonomic efficiency and space utilization:
• Vertical tall units/cabinets: Maximize vertical storage for dry provisions.
• Magic corners / carousel units: Optimize otherwise inaccessible deep corner blind spots.
• Tailored counter heights: Adjusted to the homemaker's elbow height ($10 - 15\text{ cm}$ below elbow) to minimize spinal muscular fatigue.
• Sliding pull-out baskets & soft-close drawers: Provide seamless accessibility.
• Conclusion: Modular kitchen (Option 4).

Correct option: (4) Modular kitchen

• Family Ecosystem Perspective: Boundaries and Interfaces:
• Assertion (A): In the ecosystem perspective of a family, the area which separates a system area of influence from that of other systems is known as a boundary. $\implies$ Correct.
• In human ecological systems theory, a system boundary is an imaginary or tangible perimeter that demarcates the system (family) from its suprasystem (community, environment), regulating energy and information flow.
• Reason (R): A common or shared boundary between systems is called an interface. $\implies$ Correct.
• An interface is the specific point or zone where two systems or subsystems meet and interact (e.g., family-school interface, family-market interface).
• Conclusion: Both (A) and (R) are correct (Option 1).

Correct option: (1) Both (A) and (R) are correct

• Manufacture of Synthetic and Regenerated Fibers via Dry Spinning:
• Dry Spinning Process:
• The fiber-forming polymer is dissolved in a volatile organic solvent (e.g., cellulose acetate dissolved in acetone).
• The polymer dope is extruded through spinneret orifices into a vertical spinning tower where a counter-current stream of warm air evaporates the solvent, solidifying continuous filaments.
• Comparison of Spinning Systems:
• Dry spinning: Cellulose Acetate, Spandex, Acrylic.
• Melt spinning: Nylon, Polyester, Polypropylene.
• Wet spinning: Viscose Rayon, Cuprammonium Rayon.
• Conclusion: Acetate (Option 1).

Correct option: (1) Acetate