Answer:
External military threats were a major cause of Rome's fall, and its effects spread across the empire. ... After Rome was divided, a powerful group known as the Huns began moving west, their numbers growing with captured prisoners and new allies. People from all walks of life were eager to reap the rewards of war.
A pure substance is something that occurs in nature. An element is made up of one type of atom only and cannot be split further.
In simpler terms it is true an element is a substance that is made of ONE type of atom
Pretty sure its either a or b
You could try the word “apparent” - it’s a synonym to evident and definitely fits in the second blank. If all else fails, search up “synonyms to evident” and choose as you like. I hope this helps :)
