Answer:
Lech Wałęsa.
Step-by-step explanation:
Solidarity is when group of people come together to form a union of people of common interests and responsibilities. According to history one of the renowned solidarity was the one recorded in Poland in 1980. The main and the most recognized leader of the solidarity is known as Lech Wałęsa.
The solidarity movement was a movement against communism and their solidarity movement was a success because their leader; Lech Wałęsa later became the President (even though the road to the victory was not a smooth one).