Louisiana Purchase lied between the Mississippi River and the Rocky Mountains - Mississippi river was in the East and Rocky Mountains in the west, which means that the correct answer is "Rocky Mountains".
They are both natural borders: both are hard to attack and easy to defend, making them a natural border.
1. employees 2. bond account 3. rivers
<span>This would be describing anterograde amnesia, which is the brain's inability to create new memories and can make it difficult, or even impossible, to recall recent events. An afflicted person may repeat themselves often or even forget meeting a person moments earlier.</span>
