Gill

Real World Example

Imagine being in a crowded room where the air feels stuffy and it's hard to breathe, so you search for an open window to get fresh air. This is similar to how aquatic animals rely on gills to extract oxygen from water, as they need a way to breathe in their environment. Just as you seek out a window to access fresh air when the room feels suffocating, aquatic animals use gills as their "windows" to filter and obtain oxygen from water, ensuring they can breathe and survive in their watery habitat.