What is one reason that people have lived in South America lowlands for thousands of yeats?

One reason people have lived in the South American lowlands for thousands of years is the region's rich biodiversity and fertile soil, which support agriculture and provide abundant food resources. The Amazon rainforest, in particular, offers a variety of plants and animals that have been vital for sustenance and trade. Additionally, the waterways in the area facilitate transportation and communication, making it an attractive place for settlement.