What structure is referred to in an early Mesopotamian text refers as "the bond between heaven and earth"? How does this structure function as such?

What will be an ideal response?

Answer: The ideal answer should include:
1. This structure, called a ziggurat, is a pyramidal temple.
2. The ziggurat consisted of successive platforms with exterior staircases and a shrine at the top.
3. Members of the priesthood might bring to the temple offerings of food or a sacrificial animal to the resident god.
4. These priests often placed in the temple a statue that represented themselves in perpetual prayer.