Final answer:
In temperate zones, sources of plant oil include soybeans, canola, and sunflowers; in the Mediterranean climate, it's olives; in the Sahel region, peanuts; and in tropical Africa, the African oil palm is key.
Step-by-step explanation:
The sources of plant oil vary depending on the climatic conditions of different regions. In temperate zones, common sources include soybeans, canola, and sunflowers. In areas with a Mediterranean climate, olive trees are prevalent, and olives are a significant source of plant oil. The Sahel region, being semi-arid, supports crops such as peanuts, which provide peanut oil. Finally, in tropical Africa, the African oil palm (Elaeis guineensis) is an important source of plant oil, particularly in areas with adequate rainfall and temperature conditions suitable for its growth.