What is the primary use of helium in various applications?

The primary use of helium is indeed in balloon production and airships. Helium is a noble gas that is lighter than air and non-flammable, making it an ideal choice for filling balloons and airships. Its low density provides buoyancy, allowing balloons to float while remaining safe and stable compared to hydrogen, which is flammable.

In addition to its use in balloons and airships, helium has applications in scientific research, electronics, and cryogenics, but for this question, the most recognized and widespread everyday use is in the creation of party balloons and certain lighter-than-air craft. Other options may mention valuable uses of helium, but balloon production remains the most commonly associated application in popular culture and consumer products.