The comparison of monumental architecture between the Aztec and Inca Empires requires a nuanced understanding of their respective religious practices and architectural styles. Among the provided responses, none accurately capture the complexities of their architectural significance or correctly reference their religious beliefs. However, if we are to choose the most relevant option, the following might be a logical consideration:
"The Aztec and the Inca Empires’ monumental architecture both signified the gods through natural landscape; the Aztec worshipped two gods, whereas the Inca worshipped one god."
This option highlights a common cultural aspect regarding the significance of the natural landscape in both civilizations' religious practices, albeit the detail about gods might need further refinement, as both civilizations had complex pantheons. The monumental architecture of the Aztecs, such as the Templo Mayor, and the Incas, such as Machu Picchu or the Sacsayhuamán fortress, meant much beyond simple worship of gods and were central to their cultural identity and societal structure. However, it's important to note that the Aztecs worshipped multiple gods, not just two, and the Incas had a complex relationship with their deities.
For a more comprehensive evaluation, it's vital to consider the broader religious contexts and architectural purposes beyond just the number of gods worshipped.