Which drum is used by the Aztecs, characterized by being upright and made of wood?

The drum used by the Aztecs that is characterized by being upright and made of wood is the Huehueti. This traditional drum is significant in Aztec culture and is often associated with rituals and ceremonies. The Huehueti typically has a barrel-shaped body and is played vertically, which distinguishes it from other drums that may be played flat or horizontally. Its construction from wood also contributes to its deep, resonant sound, making it vital for various cultural expressions in Aztec society, such as during festivals and religious events.

The other options refer to different instruments or concepts not related to the description provided in the question. For instance, Mariachi is a type of musical ensemble and genre rather than a specific instrument, while Teponaztli is another type of drum from Mesoamerican cultures, but it is usually not upright and features a slitted design. The Ocarina, a wind instrument, has no connection to drumming or the characteristics of the Huehueti. Thus, the Huehueti's unique features and cultural importance ensure that it is the correct answer in this context.