It is an advantage because they approach their environments from all sides equally.
Exo is spitting big things out. endo is pulling big things in. diffusion is molecules moving from an area of high concentration to an area of low concentration until it is balanced
your answer would be c) iron deficiency
They are all eukaryotic orgabisns, have a wild nature, they all have a niche, etc.
The Americans colonies became free and independent states explanation: because they declared independence