What year did Avatar become the highest grossing film?

Avatar became the highest-grossing film in 2009. Directed by James Cameron, it was released in December of that year and quickly achieved record-breaking box office success. The film's innovative use of 3D technology and visually stunning world-building captivated audiences worldwide, leading to its immense popularity. Within weeks of its release, Avatar surpassed previous records held by other major films, solidifying its position at the top of the box office charts. The title of highest-grossing film was a significant milestone in film history, as it remained unchallenged until Avengers: Endgame in 2019 briefly took the lead before Avatar reclaimed the title due to re-releases in theaters. The context of the other years provided in the options does not align with the release timeline or box office performance of Avatar.