Explanation:

- Am: Tropical monsoon climate with heavy rainfall in wet seasons. Not temperate or marine.

- BSh: Semi-arid (steppe) climate with low rainfall; likely found in subtropical areas, not marine.

- BSk: Semi-arid (steppe) cold; found in temperate areas, but lacks substantial rainfall.

- Cfb: Temperate marine climate, known for mild temperatures and no dry season. Features consistent rainfall throughout the year, typical of areas like Northwest Europe.

Your choice:

- Cfb is indeed a temperate marine climate with substantial, year-round rainfall.