Sauropods are long huge creatures there very calm for dinosaur standards as adults of course, the youngsters are threatened if there species that leaves there young to grow up on there own. A species like sauroposiedon have a hard time growing up while hungry predators are prowling around them all the time. Sauropods like titanosaurs get armour while young so they are harder to kill, so some sauropods are different from other ones some grow armour as protection some get as big as possible in the shortest amount of time and some look after there young but there all sauropods.
Till the next time!
Owen Watts 