Three Days Grace is Hard Rock/Metal.
Most people enjoy Three Days Grace's music because Three Days Grace writes music that people can relate to with their lives. People also love Three Days Grace because of the style and genre of their music.
Historical Fiction is its genre.
Nine Days the Band is Atl. Rock
Technically they are, but they are more Alternative metal. Alt metal is still a sub genre of heavy metal so I guess your answer is yes.
Autobiography is the genre of this book
Pop
Non-fiction
Three Days Grace doesn't have one specific genre. They have several genres that differ between albums. They are considered Metal at times, Post-Grunge, Hard Rock, and Alternative at others.
The main difference betwen the mystery and the suspense genre's are that the mystery genre has a detective or superhero tyring to resolve an issue, and a suspence genre has forshadowing, ironic events and a great deal of symbolism.
Juvenile realistic fiction.
Before Three Days Grace's band name was Three Days Grace, it was Groundswell.
Three Days Grace's first album was titled Three Days Grace.