The mayas for example made striking advances in writing, astronomy, and architecture. Both the Myers in the Aztecs created highly accurate calendars. The Aztecs adapted earlier pyramid designs to build massive stone temples. The Inca showed great skill in engineering in engineering and managing their huge empire. Hope this helps! :)
I think it's explanation since the text shows comparison which isn't direct, ni similar words are present, ruling out synonyms and examples aren't present in the text.
