Answer:Imagine our Earth as a giant spaceship, and air is like its special protective bubble and also the fuel that keeps everyone on board alive!Here's why air exists and why it's super important: 1. It's Our Breath of Life: The most important reason is for us to breathe! Air has oxygen, which every living thing (humans, animals, and even plants at night) needs to get energy from food and stay alive. Without oxygen, we couldn't survive for more than a few minutes. 2. Plants Need It Too: Air also contains carbon dioxide. While we breathe it out, plants breathe it in! They use carbon dioxide, sunlight, and water to make their own food and, super importantly, release the oxygen that we breathe. It's a perfect give-and-take! 3. Earth's Blanket: Our air acts like a cozy blanket around the Earth. It traps some of the sun's warmth, preventing our planet from becoming super hot during the day and freezing cold at night. This keeps the temperature just right for life to thrive. 4. Shield from Space: Air protects us from dangers coming from outer space. It burns up most small rocks (meteors) that enter our atmosphere, turning them into "shooting stars" before they can hit the ground. It also blocks a lot of harmful rays from the sun. 5. It Makes Sound and Weather: Air is what carries sound waves, so we can hear each other, music, and everything around us. It's also responsible for all our weather – wind, clouds, rain, and storms – by moving moisture and heat around the planet.