Dulce de leche is a caramel-like sauce widely popular in which region?

Latin America

What animal feeds its young high-fat milk to rapidly increase pup weight early in life? What do you call the imaginary line around the center of the Earth? The River Thames flows through which European capital city? What vitamin is plentiful in citrus fruits? What popular sandbox game by Rockstar lets players explore an expansive Western frontier as outlaw Arthur Morgan?