To answer your question accurately, I would need to know the specific options you have for factors of physical geography. Generally speaking, some common factors that could be relevant to both Miami and Monrovia include:
- Proximity to coastlines (both cities are coastal)
- Tropical climate conditions
- Presence of rivers or wetlands
If you can provide the specific options you are considering, I can help you determine which one is a factor of the physical geography of both cities.