Final answer:
Metastasis is most likely to occur in squamous cell carcinoma, a common and potentially aggressive skin cancer that can spread if not promptly treated.
Step-by-step explanation:
Metastasis is more likely to occur in squamous cell carcinoma than in the other options listed. Squamous cell carcinoma affects the squamous cells of the epidermis and can be aggressive, potentially leading to metastases if not treated. While it is the second most common type of skin cancer and is generally localized, it is considered more likely to metastasize compared to basal cell carcinoma, which is the most common skin cancer but rarely metastasizes. Ameloblastoma, complex odontoma, and odontogenic fibroma are all related to odontogenic tissues and are generally not associated with high rates of metastasis compared to squamous cell carcinoma.