Answer:
a. Canadian Shield. i think so
Answer:
D
Explanation:
If NASA had constructed a Space Shuttle without knowing if it would be safe for its passengers, there could be many casualties. So they would test it beforehand using a model, to make sure that it will be safe and sturdy for when they build it.
No one actually knows, different religions and people around the world believe something different or similar happened after the big bang. some people even question if the big bang happened!
