Reagan's biggest challenge during his first term as president was . a failing economy
Iran hostage crisis
White House scandal
striking steel workers

imperial crisis leads to civil war.

roman forces withdraw from britain as goths attack rome.

odoacer topples romulus augustus

huns attack the empire and drive german peoples ahead of them.

answer; the edward snowden leaks of nsa classified material;

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't

answer; motor learning;