Answer:
Complex
Step-by-step explanation:
A complex sentence includes both a dependent and independent clause, which a dependent clause cannot stand alone, even if a verb and a noun exist, but an independent clause can, in a sentence:
One of the many surprising facts about western Africa is that the Sahara was not always a desert.
Dependent Clause: Bold
Independent Clause: Underline
I am joyous to assist you anytime.