Explain Briefly why helium is more preferable to hydrogen as a rocket fuel

Hydrogen (H₂) is highly flammable and reactive, posing significant safety risks during handling, storage, and launch due to its wide explosive range when mixed with air. In contrast, helium (He) does not react with other substances and will not burn, making it much safer to use. For instance, helium is often used as a pressurant to force liquid propellants into rocket engines because it won't react with the fuel or oxidizer.