Final answer:
The Mayans are known for freestanding stela and slash and burn farming methods. They made lasting inscriptions on limestone stelae and practiced primitive agriculture to sustain their cities.
Step-by-step explanation:
The Mayans were known for multiple achievements and cultural elements. Among the answers provided, freestanding stela (option b) and slash and burn farming methods (option c) are directly related to the Mayan civilization. The carved stone stelae, used as monuments, were inscribed with a hieroglyphic script providing a rich historical record of Mayan life. These stelae were made of limestone, which was ideal for carving and became more durable as it hardened over time. The Mayans also engaged in slash and burn farming methods, which was a technique for clearing land to grow crops. This was part of their primitive agricultural practices, necessary for sustaining their cities and trade networks. The option about psychological reality in art (a) also applies since Mayan art did convey complex themes and narratives, but this aspect is less straightforward and specific than their stelae and farming methods. The options d) giant carved stone heads, e) famous city of Tenochtitlan, and f) worship of a deity in the form of a jaguar are incorrect and relate to other Mesoamerican cultures, such as the Olmecs and the Aztecs.