The route "London -> Moscow -> Baghdad" is not a sea route.
A sea route refers to a navigable waterway used for transportation of goods or passengers by ships. In this case, the route "London -> Moscow -> Baghdad" does not involve any sea voyage as it passes through landlocked regions, such as Moscow.
On the other hand, the routes "London -> Cape Town --> Melbourne", "New York -> London -> Rotterdam", and "Sydney -> Suez -> London" all involve sea voyages, as they connect cities by navigable waterways.
So, the route "London -> Moscow -> Baghdad" is not a sea route.