Even though the Chattahoochee River has the sufficient depth and width for part of its flow, namely from Columbus to its mouth at the sea, it is not used for trade because it simply not possible. The reason why it is not possible, is that there's a dam built on it, so it is not possible for any ships or boats to pass the dam and continue their sail up the river.
The doctrine of the Incarnation helps Catholics believe that God is among them, and is aware of their struggles. The Incarnation specifically relates to Jesus, the son of God, whom lived on Earth and was a prime example of putting others before themselves and kindness.
