Final answer:
The Olmecs carved monuments called stelae, which were stone slabs or columns with images and hieroglyphic inscriptions.
Step-by-step explanation:
The Mesoamerican civilization that carved monuments called stelae is the Olmecs. The Olmecs were one of the earliest complex societies in Mesoamerica and they created impressive stone sculptures, including large heads and stelae. These stelae were stone slabs or columns typically carved with images and hieroglyphic inscriptions to commemorate important events, rulers, or deities.