3) 2) 1) i think this is the right answer but c looks correct too\
Transporting oxygen and Nutrients throughout our body.
To keep out dirt and other bad things
Unmanaged, conflict within families harms parents' psychological and physical health, and the health, wellbeing and development of their children. Children develop poorer social skills, for example showing aggression and lower prosocial behaviour with their peers.
It is important because it lowers the risk of different cancers and lowers the risk of diabetes
