Why is this the answer?

The answer is photo because this riddle is playing a very tricky but fun game with words. It uses words that have two different meanings to trick you into thinking something scary is happening. But really, the riddle is just describing how people used to make pictures a long time ago, with a special kind of camera and paper. First, the riddle says the woman "shoots" her husband. When we think of "shooting," we usually think of a gun, which is very dangerous. But a photographer also "shoots" when they take a picture with a camera. This means the woman is simply taking a picture of her husband. This is the first trick in the puzzle. Next, the riddle says she "holds him under water for five minutes." This sounds scary for the husband, but it is actually the picture being put into a tray of liquid. After a photographer takes a picture, they have to put the picture paper into special liquid chemicals to make the image appear. This is called "developing the photo," and it is exactly like holding the picture under water in a tray. She is only developing the photograph she took of her husband. Then, she "hangs him." This is another word trick. After a photograph is developed in the liquid, it is very wet. Photographers would "hang" the finished pictures on a line with clothes pins so they could dry out completely. So, she is simply hanging the photograph to dry. The best clue is the last sentence: "Five minutes later they enjoy a wonderful dinner together." This tells you that the husband is completely fine! He was never in any danger because the whole riddle was just a clever way to describe the process of taking, developing, and drying a photograph. It is a fantastic trick with words.