They were formed in 1951<span> and </span>1958 and the<span> EU traces its origins from the European Coal and Steel Community.</span>
Answer:
The seven hills' denizens began to interact, which began to bond the groups. The city of Rome, thus, came into being as these separate settlements acted as a group, draining the marshy valleys between them and turning them into markets (fora in Latin).
Explanation: