What are the requirements for membership in the eu?

Price stability, to show inflation is controlled;Soundness and sustainability of public finances, through limits on government borrowing and national debt to avoid excessive deficit;Exchange-rate stability, through participation in the Exchange Rate Mechanism (ERM II) for at least two years without strong deviations from the ERM II central rate;Long-term interest rates, to assess the durability of the convergence achieved by fulfilling the other criteria

Answer primary waves;

Answer they are produced by collision of tectonic plates;