Why is Venom 16+?

Could you elaborate on the reasons behind the 16+ rating for the movie Venom? Is it due to the graphic violence, intense action sequences, or the portrayal of complex themes and characters that may be too mature for younger audiences? Additionally, how does this rating ensure that the movie is suitable for the intended demographic while still appealing to fans of the character and genre? Lastly, are there any specific scenes or elements within the movie that contribute to its 16+ rating?