In general, the borders of the federal state of Washington are in accordance to natural physical features.
The border with Canada,, the northern one, is defined by the Okanogan Range and the Kettle Range, two highlands.
The border with Oregon, the southern one, is defined mostly with the Columbia River, and partially by the Blue Mountains.
The border with Idaho, the eastern one, is defined with the edge of the lowland part of the Columbia River Basin.
While the western border is a border with the open water of the Pacific Ocean.
Niger and Congo are two rivers after which countries are named (actually in both cases two countries each) - and those are African countries, so they must be in Africa.
Zambezi is a river in Angola and Namibia.
Tigris is a River in Mesopotamia, in Asia - so that's the correct answer!
Answer:
a;d;e
Explanation:
the title explains the subject, the region covered, and the objective of the the map
