The correct response is: The Bantu brought advanced iron tools and new crops such as cereal grains to the new regions they settled.
The Bantu migration, which occurred over several centuries, significantly impacted farming techniques across sub-Saharan Africa. The Bantu people introduced ironworking technology that allowed for the production of more efficient farming tools. This advancement enabled them to clear land for agriculture more effectively and to cultivate new crops, including various cereal grains. The spread of these agricultural practices contributed to more organized and settled forms of agriculture in the regions they migrated to.