By Rob Lenihan Amazon has a stake in the electric cargo vehicle maker Rivian Automotive as it ‘adds significant transportation assets to ensure fast, on-time delivery.’ Amazon (AMZN) – Get Amazon.com, Inc. Report moves an awful lot of stuff in a whole lot of different ways. The company has a fleet of planes that bring goods to its fleet of trucks so they can be delivered by the company’s fleet of third-party delivery vans. It’s a massive operation that provides the backbone of the retail giant’s backbone. If one piece of the puzzle fails then goods don’t get where they are going in a timely fa…