Gloomy adjective best describes the tone of Endgame.
D. Gloomy
Step-by-step explanation:
A gloomy is a showing which express hopeless or despairing; or sad view of the future. Toward the finish of Endgame, Tony snaps his own glove bearing the Infinity Stones to destroy Thanos and his powers slaughtered him.
Tony Stark yielded himself so as to spare the universe toward the finish of Avengers: Endgame.
He utilizes all the Infinity Stones to wish Thanos (Josh Brolin) and his military out of presence yet applies such a lot of solidarity that he bites the dust all the while. So Gloomy (hopeless) adjective best describes the tone of Endgame.