Question

photo by alex guillard
in northern europe, many reclaimed polders, such as the one in the photo above, are created by systems of ______
that have been built to hold back water
a、 fjords
b、 foehns
c、 siroccos
d、 dikes

Explanation:

Polders are low-lying areas reclaimed from water in Northern Europe. The structures built to hold back water for this purpose are dikes. Fjords are glacial inlets, foehns are warm winds, and siroccos are hot, dry winds, none of which relate to reclaiming land from water.

Answer:

D. dikes