Could somebody help me please

i think black land goes to " a fan shaped area of land at the mouth of a rive."

and red land goes to " an area of river rapids or waterfalls"

and i think delta goes to "a region of fertile soil called silt"

And i think cataract goes to " a region of desert sands

Explanation:

answer: the ocean

explanation: if you map out 30 n and 40 n latitude, you will get the ocean

they were all fought in the middle east during ww1