A star-forming region is a part of space where new stars are born. These areas are often filled with gas and dust, primarily composed of hydrogen, which is the main ingredient for star formation. When the gas and dust clump together under gravity, they can create dense cores that eventually ignite nuclear fusion, leading to the birth of a star. These regions are typically found in large molecular clouds, such as the Orion Nebula or the Carina Nebula. Over time, as stars form, they can influence their surroundings, creating new structures and even triggering the formation of additional stars in the process.