Question

It is difficult to travel through the huge expanse of parched sands in the Sahara Desert, where oases are plentiful but distant from each other.

Which phrase is the adverb clause?

A. through the huge expanse
B. of parched sands in the Sahara Desert
C. to travel
D. where oases are plentiful but distant from each other

Answer 1

B. Of parched sands In the Sahara Desert

The use of the subordinating conjunction gives it away.

Answer 2

it's a through the huge expanse