Final answer:
Italy joined Hitler due to the belief in racial superiority, strained relations with Britain and France, and sympathy towards Germany.
Step-by-step explanation:
Italy joined Hitler and not its World War I allies due to several factors.
Firstly, Mussolini believed that Italians and Germans were of a superior race, which aligned with Hitler's ideology of Aryan supremacy.
Secondly, Mussolini had strained relations with Britain and France, particularly after Italy's invasion of Abyssinia (now Ethiopia) in 1935, and felt that aligning with Germany would give Italy more power and influence in Europe.
Lastly, Italy may have also joined Hitler because they felt bad for Germany, which was fighting a lone battle after its isolation from the international community due to the harsh terms of the Treaty of Versailles.
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