Aiden is a 4 month old baby boy. when he was born his mother decided to breast feed him, instead of using formula. what type of immunity will baby aiden develop from receiving mom's antibodies through her breast milk?

Actually baby Aiden will surely develop a strong secretory Iga antibodies which is passive immunity to most of the types of bacteria and viruses, ie, as a protection against infections, which inturn is a response to the baby to its immune system in the form active immunity.