Critical Thinking vs. Shariah Part 49 Ramadan Fasting Part B

Did you know that Ramadan fasting is a secondary form of fasting according to Islamic sources and Shariah?

If that is true critical thinking poses the question, why were other fasts copied?

Is Ramadan an imitation of pagan feasting like the hajj and the treatment of the Ka'aba?

Did you know Fasting can be invalidated just like prayer can be invalidated, even if you don't eat or drink?