Which is false:

a. three desert surfaces= hamada, reg, erg
b. exotic= ephemeral
c. Sahel= desertification
d. wind transport= creep, saltation, suspension
e. dunes= barchan, transverse, seif

B. . exotic= ephemeral

Explanation:

An organism is considered as 'Exotic' if the organisms exist in an environment outside of their natural habitat (for examples, polar bear that is imported to a zoo in california.)

Ephemeral organisms on the other hand, exist naturally on ecosystem such as wetlands or lake. These organism do not exist all year long, but they did not live outside their natural habitat.

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answer; primary source information;