Help I’m stuck!! Explain why the Western Roman Empire fell/collapsed. Use at least three reasons/causes. Please use full sentences

Doesn’t have to be super long but will give and extra points! Thank you!!

The fall of the Western Roman Empire can be attributed to the string of military losses the empire faced such as against the surrounding Germanic tribes, the Visigoths (who sacked Rome in 410). Another rationale can be due to political instability and corruption as the leaders as many factions including the Praetorian guard who were supposed to protect the emperor had been assassinating many and placing new sovreigns at will which led to large power vacuums and instability leading to distrust from the citizens. The third rationale can be due to the weakening of the Roman legions through the use of foreign mercenaries which tend to be unloyal to the empire leading to a overall weakened force.  

Explanation:

your answer would be (a)