This is an internal conflict because Odysseus was caught up in his own arrogance and was trapped in a cave with a Cyclops. He didn't listen to what anybody had to say; Odysseus is very naïve and thinks that he can do everything on his own.
This is an external conflict because Odysseus gets caught trying to steal some food by the Cyclops and was stuck in the cave and couldn't get out. The Cyclops was eating Odysseus's men and he couldn't stop him.
This is an external conflict because when Odysseus was trying to leave the waves was rocking the boat and shaking them side to side. The waves was like tentacles that were trying to reach out and grab them. The nature was going against them in trying to leave.