The phrase during separate semesters helps reveal the meaning of the word concurrent which means at the same time.
Usually the exposition is where you meet the character and get introduced to the problem.
True they also have done electrical gadgets,nanotechnology
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.
A. Warm air rises and F. Cooler air travels back to the ocean surface
