根据短文理解，选择正确答案。

    Nowadays, camping has been popular among young people. It's a great way to be outside and enjoy the nature. Whether you prefer to be in the woods, mountains, or by the river, you are sure to have a wonderful experience when you go camping. Here are some suggestions for camping.

    Fire may be dangerous, so just use it only when you must. Make sure to put the fire out when you don't use it. Or it may cause a fire. When you are talking, keep your voice down. If you talk loudly, you may disturb (打扰) other people, and you will also miss the chance to see wild animals outside. It is necessary to put up your tent only in safe areas. If you put up your tent in other areas, you may get into trouble. Remember to do it for your safety. Don't forget to take your camera, or you will miss the wonderful natural wonders. Later, you'll understand how nice they are. Make sure your camera has enough power. People often get lost in the forest. It's a good way to take a map that helps you to get the right direction. Now, people usually take GPS with them. Maps and GPS can help you find the way easily.