Why is this the answer?

The answer is camera because this special riddle uses clever word pictures to describe one of the most important tools for saving your memories. It tells a secret story about how this everyday object works. Let's look at the first clue: "I have one eye." This is a tricky part, because the riddle is talking about the camera's lens. Think about what a camera looks like. That big, round glass part on the front is the lens, and it acts just like a single eye for the camera. It’s the part that opens up to let the light in and see what you are pointing at. Without its one eye, the camera wouldn't be able to see or capture any pictures at all. The second clue says, "See near and far." A camera's special glass eye is amazing because it can focus on things at different distances. When you take a picture of a tiny ant crawling right next to you, the lens can make it look sharp and clear. That’s seeing "near." When you point the camera high into the sky to take a picture of a soaring bird or a far-off mountain, the lens can adjust to make those distant objects look sharp too. That’s seeing "far." It does this job of seeing both near and far better than almost anything else. Now for the last part: "I hold the moments you treasure and the things that make you weep." This is the most beautiful clue. A camera doesn't just see things for a second; it captures them and keeps them safe forever. When you take a photograph of your friends, your family, or a fun vacation, those pictures become the moments you "treasure." They make you feel happy and help you remember all the good times. But a camera also saves pictures of times that might make you feel sad, or "weep," like a picture of a grandparent you miss. These photos are important memories that remind you of deep feelings. The camera is like a careful storyteller for all your feelings, both happy and sad, keeping them safe in a picture that you can look at anytime you want.