When I go rock climbing, I prefer climbing in landscapes that present a challenge.

What type of sentence is this?

A. a simple sentence

B. a complex sentence

C. a compound sentence

D. a compound-complex sentence

Complex sentence

There are four types of sentences, simple sentences, complex sentences, compound sentences, and compound-complex sentence.

All the difficulty lies in the types of clauses forming the sentence as a whole, there can be "independent" and "dependent" clauses.

"Dependent" clauses are sentences that cannot stand alone and convey full meaning, for example: "When I go rock climbing" this sentence has a subject and a verb, but its meaning raises questions, it does not have a complete idea of its own.

"Independent" clauses are sentences that can stand alone as a full sentence and convey a full meaning, for example: "I prefer climbing in landscapes that present a challenge."

A simple sentence has the most basic elements that make it a sentence: a subject, a verb, and a completed thought. They are also refer as an independent clause.

A compound sentence refers to a sentence made up of two independent clauses (or complete sentences) connected to one another with a coordinating conjunction.

A complex sentence is made up of an independent clause and one or more dependent clauses connected to it.

A complex-compound sentence is made up of two independent clauses joined to one or more dependent clauses connected to it.

The answer to this question is:

B. a complex sentence

When I go rock climbing, I prefer climbing in landscapes that present a challenge.

Dependand clause, independant clause.