Final answer:
The sentence "When I go rock climbing, I prefer climbing in landscapes that present a challenge" is a complex sentence.
Step-by-step explanation:
The sentence "When I go rock climbing, I prefer climbing in landscapes that present a challenge" is a complex sentence. A complex sentence is a sentence that contains an independent clause and at least one dependent clause. In this sentence, the independent clause is "I prefer climbing in landscapes that present a challenge" and the dependent clause is "When I go rock climbing".
Learn more about Complex Sentences