Answer:
Hope this helps!
Explanation:
At this extreme altitude gas molecules are widely separated. Above 60 miles (100 km) from Earth's surface the chemical composition of air becomes strongly dependent on altitude and the atmosphere becomes enriched with lighter gases (atomic oxygen, helium and hydrogen).
Answer:
it could be a or c
Explanation:
unveil means to uncover or present a new monument or work of art as part of a public ceremony. so most likely it's c
Answer:
I think definition is the answer
hope it is right
