The correct response is: The Bantu brought advanced iron tools and new crops such as cereal grains to the new regions they settled.
During the Bantu migration, the Bantu people introduced advanced agricultural techniques, including the use of iron tools for farming. This innovation allowed them to cultivate the land more efficiently and effectively. Additionally, they brought new crops, such as cereal grains, which contributed to agricultural diversity and improved food security in the regions they settled.