Question

Helium is an inert gas used in lighter-than-air crafts like blimps because

Answer 1

Answer:

D. a nonrenewable resource

Explanation:

From the description given, helium is a non-renewable resource.

• A non-renewable resource is one in which cannot be replenished  by natural processes as they consumed.
• They get depleted as they are removed from nature.
• Helium formation cannot match its consumption if exploited.