Generally the role of sphinxes was as temple guardians; they were placed in association with architectural structures such as royal tombs or religious temples. See link below.
the egyptians worshiped the sphinx as a god the name sphinx is made by the Greeks its actual name is pe'r ah'h
the sphinx is unique because it was built a long time ago and has an important history
Andro Sphinx and Sphinx Teleia can be destroyed with Pyramid of Light and used to summon Theinen the Great Sphinx.
The Sphinx is important to save because it is a monument that represents the ancient Egyptians culture and religion.
The Sphinx was built as a tribute to the God Ra, which was Venus on fire.
The Egyptians
The sphinx was carved out of solid limestone. No bricks were used.
Tourism.
according to history it was built to the glory of the Pharaoh as a tomb.
Pig, rat, Cow, sheep and a domestic housecat. There was never a Lion used for the sphinx, And the sphinx was Recently made to create an interesting story for scientists to tell and to get them busy.
It is now used for Tourisim. It was used to symbolise power.
sphinxes were used to protect entrances of temples.