The answer would be the id. This is the identity part made up of oblivious clairvoyant vitality that attempts to fulfill fundamental urges, needs, and wants. Likewise, it works in light of the joy standard, which requests quick satisfaction of necessities.
The air is part of the atmosphere, so it'll have to be the process of Atmospheric Perspective.
Answer:
ANSWER
<em>REGULATORY</em><em> </em>
<em>no </em><em>explicación</em>
Rivers are sources of water and food.
Wood chopped from upstream can be easily transported downstream by the river by pushing the logs into the river.
Rivers also allows trading by boat with other cities or towns along the river.