If you have a choice between destroying a normal Beasts token and a Beasts token marked by Unearth a Beast of Wrathful Stone, can you pick the marked Beasts? If so, what happens?

If you have a choice between destroying a normal Beasts token and a Beasts token marked by Unearth a Beast of Wrathful Stone, can you pick the marked Beasts? If so, what happens?

Yes, you can pick the marked Beasts, and it's generally advantageous to do so: if it would be destroyed, removed, or replaced, skip those effects.
It won't count as destroyed, removed, or replaced for effects that scale off the number of Beasts that leave the board, like A Dreadful Tide of Scurrying Flesh or Pent-Up Calamity.