You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Canadian_Armed_Forces

Context:
The Canadian Rangers, who provide surveillance and patrol services in Canada's arctic and other remote areas, are an essential reserve force component used for Canada's exercise of sovereignty over its northern territory.

Question:
What do Canadian Rangers perform?

provide surveillance and patrol services