Final answer:
David Livingstone compared Victoria Falls, which he was seeing for the first time, to the well-known Niagara Falls, a familiar landmark to his British readers.
Step-by-step explanation:
When David Livingstone was describing his experience of Victoria Falls for the first time, he helped his readers to envision what he was witnessing by comparing it to a geographic landmark that was familiar to Brits, the Niagara Falls. Victoria Falls is indeed the largest waterfall in the world and would become one of Africa’s most famous sites, drawing many comparisons to other notable waterfalls around the world. By comparing Victoria Falls to the Niagara Falls, Livingstone utilized a common technique of linking a novel or foreign concept to a known entity to create a strong visual image for his account.