Chelating Ligand?

[Sophia Diaz - Dis 1B]

I was looking at the practice problem from the "French Toast" worksheet and number #24 asks whether or not a molecule is a chelating ligand. I tried to look it up but I don't understand the explanation.
What exactly is a chelating ligand and how do you know when a molecule is a chelating ligand?

[Andrew Evans - 1G]

A ligand chelates with the transition metal when it binds at two different sites. So it forms a ring of atoms from the transition metal, through one binding site, through the ligand, through to the second binding site, and back to the transition metal.

So chelating ligands, any polydentate ligand for the most part.

[KC Navarro_1H]

Chelates only apply to the ligand itself, right? Not the coordinate compound as a whole?

[Andrew Evans - 1G]

A ligand is described as chelating, but the chelate's ring must include the transition metal or else it wouldn't be a ring it would just be an arch