1) A = baby, B = placenta, C = amniotic sac
2) - picture A is the identical twins because there is one egg and one amiotic sac. picture B is the fraternal twins because there are two egg and his own amiotic sac.
- on picture A, there are two babies, two amiotic sac and two placenta
on picture B, there are two babies, two amiotic sac and one placenta
