Câu hỏi:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

You put on your backpack and you are ready to head to the mountains for a walk, but does that mean you are hiking or trekking? People often think of trekking and hiking as synonyms, but there are things that set these two activities apart. Duration is one of the most obvious distinctions between these two activities. Trekking usually lasts at least two days, but often even longer than that. People that go trekking often have a final destination in mind. They aspire to reach this destination and can walk thousands of kilometres per trekking trip. On the other hand, hikes are shorter in duration compared to trekking. Hiking can also be an overnight experience, but it usually won’t take several days as trekking would. Another difference between trekking and hiking is the type of terrain. Hikers often use hiking trails that are marked and go through mountains, forests, hills, or other natural environments that people want to explore. In comparison, trekkers have much more freedom in their journeys, which are not always on marked trails and often go through unexplored natural areas such as mountains, roads, beaches, forests, and much more. This way, they can see untouched nature. By now, you can see that trekking is not for everybody. It’s an activity that takes a lot of time, goes through different terrains, and requires mental and physical preparedness. On the other hand, hiking is a leisure activity that can be done by many, even if they haven't hiked before. Usually, with hiking, you will have information about the difficulty level or length of a hiking path, so you can know whether it suits your physical abilities. Therefore, if you are a beginner or just want a pleasant walk instead of challenging yourself, you can always choose an easy, less strenuous trail. (Adapted from mayamaya.ch) 

What is the passage mainly about?