[sansa]

sore means it.
kore means this.
are means that.

sono, kono, and ano use with noun.

sono+noun means it noun.
kono+noun means this noun.
ano+ noun means that noun.

for example.　
watashi ha are ga hoshii desu.
I want that.

watashi ha ano kamera ga hoshii desu.
I want that camera.