Sassy means that you have an attitude you know like for ex: my sister is so sassy because she thinks she is better than the rest.
What causes them is because of two unusual factors. Resonance and the shape of the bay. The water in the bay has a natural resonance or 'rocking motion' called seich
They are keeping the randstad from expanding any further. I hope this helps! :D
I want to say it has to be Genetics
Answer:
Control and Prevention of two cases of novel coronavirus, ... they became ill and have been self-isolating at home ever ...