Q. "Pemba" and "Zanzibar" Islands of Africa are famous for the cultivation and export of:
Answer: Cloves
Notes: Pemba Island is famous for the cultivation of cloves. The island is part of the Zanzibar Archipelago in Tanzania, which is located in the Indian Ocean. Pemba is known as the "clove island" because it is the world's main exporter of cloves. The island has 3.5 million clove trees, which is the largest concentration of clove trees in Zanzibar. Pemba's growing conditions are better than those on Unguja island.  Zanzibar's main industries are spices, raffia, and tourism. The islands produce cloves, nutmeg, cinnamon, and black pepper. The Zanzibar Archipelago, along with Tanzania's Mafia Island, are sometimes called the "Spice Islands".