Ответ:

Plane :

This is a very convenient mode of transport,and also moving to any point is the fastest and safest way. All food rarities and amenities are present.

bus :

This is a more common form of transport, where you can gather more people than in ordinary passenger cars.Also, the bus is the cheapest among other transports. And will take you to any designated stop.

their relationship :

Among them, you can notice several similarities,both are transports, as well as some of the cheapest compared to the rest,and also both are huge,where many people are placed.