Final answer:
The Lim and Tara rivers flow northward in the Balkans, merging with the Drina River, primarily within Bosnia and Herzegovina and Serbia.
Step-by-step explanation:
The Lim and Tara rivers both flow northward and merge into the Drina River, which itself is a tributary of the Sava River, ultimately joining the Danube. This river system is located in the Balkans, primarily within the borders of Bosnia and Herzegovina and Serbia.
In Serbia, the Lim and Tara rivers flow northward and merge with the Drina River. The Drina River then continues its northward flow through Bosnia and Herzegovina, eventually crossing the border into Serbia again.