Which item must be properly installed to ensure safety in manufactured homes?

Hydraulic jacks are crucial for ensuring the safety and stability of manufactured homes. These jacks are used during the setup and installation of the home to level it correctly and support the structure. Proper installation of hydraulic jacks is essential because they help distribute the weight of the home evenly and prevent potential structural issues that could arise from an unlevel or improperly supported foundation.

Conversely, while items like interior lighting fixtures and exterior paint contribute to the aesthetics and functionality of the home, they do not play a critical role in the overall safety and structural integrity. Furniture, while important for everyday use, also does not affect the safety of the home itself. Therefore, hydraulic jacks stand out as the key component that directly impacts the safety of manufactured homes.