Deep water ports, canals, bridges, and railroads are examples of which of the following
mass transit
green energy methods
internal imporovements
the spoils system

mass transit.

Explanation:

Mass transit is also referred to as public or mass transportation and it can be defined as the movement of people and goods from one location to another within an urban settlement area through the use of modern technology transport systems such as buses, ferries, metros, ships, trams, airplanes, trains, etc.

One of the major advantages of mass transit is its low cost due to the fact that a large number of passengers are transported at a specific period of time.

Hence, deep water ports, canals, bridges, and railroads are examples of mass transit.

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.