is there any anime adaptation of the manga?
Yes, an anime series based on the manga is currently being aired in Japan.
Attack on Titan
An anime series based on the manga is currently being aired in Japan. 
what happens at the end of attack on titan manga The Corps theorize that Titans were originally humans, and may regain their human form by consuming an individual with Titan power, acquiring those abilities for themselves. what are the critical responses the manga got? Many have analyzed "Attack on Titan" as representing "the hopelessness felt by young people in today's society" in what way the manga is interpreted on the basis of politics? The persecution by Marleyans is similar to the Jewish persecution by Nazis in Germany. This give rise to the theories of antisemitism and fascism. how are the sales of the manga? Oricon reported that 30 million volumes of the series have been sold. By November 2014, the manga had 45 million copies in print. who is the creator of the manga? UNANSWERABLE who is the publisher of the manga? UNANSWERABLE
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Attack on Titan [SEP] Anime
An anime series based on the manga is currently being aired in Japan. Produced by Wit Studio and directed by Tetsurō Araki, a first season aired between April 7, 2013, and September 29, 2013 originally on Mainichi Broadcasting System (MBS). The second and the third season, directed by Masashi Koizuka, first aired from April 1, 2017 to June 17, 2017, and between July 23, 2018 and July 1, 2019 respectively on MBS and NHK General TV. Upon the airing of the final episode of the third season on July 1, 2019, it was announced that the fourth and final season of the anime series is scheduled for release in Fall 2020 on NHK General.