There passage is trying to make it clear/logical about the topic in a straightforward manner
Answer:
It would go in order the way it's put
Explanation:
The cause is that the interest in balloons grows so the first effect/cause would be that inventors develp hydrogen balloons, the second effect/cause is a balloon filled with hydrogen is launched, and the final effect is the very first hot air balloon is launched. I am sorry if this was confusing.
