The last sentence about reliving the writers younger days as in memories
Kites can be described as graceful ballet dancers with the precision of a sniper. They are small, fast birds, "If you are lucky enough to see one in flight, you will be amazed at the quick turns, graceful moves, and speedy pursuits of this bird". They have a sharp eye and can spot small things while flying "<span>Both kites are known to eat while flying, unlike most other birds of prey". Kites are known for the graceful dance they perform in the air. They may be small, but they should never be underestimated.</span>
The function of the noun clause <em>that you are ready to graduate </em>is that of the subject of this sentence.
If you are unsure how to solve this, just change the whole noun clause with a pronoun, and it will become much easier: That is very clear to me. What is very clear to me? That.
Or use that question technique with this example: What is very clear to me? That you are ready to graduate.
