Final answer:
The radiation dose in wood-frame homes is primarily due to radon gas, which can seep into homes through cracks in the foundation. The difference in the annual radiation dose between different locations depends on factors such as the concentration of uranium in the soil and the ventilation in the home.
Step-by-step explanation:
The radiation dose in wood-frame homes is primarily due to radon gas, which is produced by the natural decay of uranium in the soil. Radon can seep into homes through cracks in the foundation and can increase the radiation dose. However, the difference in the annual radiation dose between wood-frame homes in different locations is unlikely to be significant. Factors such as the concentration of uranium in the soil and the ventilation in the home can influence the radon levels and therefore the radiation dose. Without specific information about these factors, it is difficult to determine the exact change in Lucinda's annual radiation dose.