Final answer:
The best known festival in all of Latin America is Carnival.
Step-by-step explanation:
The best known festival in all of Latin America is Carnival.
During Carnival, parades of costumed dancers fill the streets of many cities, interacting with the audience and attracting crowds of followers. It is an annual festival of music and dance held every year to mark the beginning of the Catholic season of Lent. Brazil's Carnival is particularly famous, but other countries in Latin America also celebrate their own versions of the festival.
Learn more about Carnival