Antibodies that are passed on from mother to child are part of
adaptive or active immunity
passive immunity
innate or natural immunity

The correct answer for the full in the blank is "Passive immunity".

Passive immunity is the transfer of active humoral response (with ready made antibodies) into the individual.

It can be naturally acquired by mother during gestation period (where antibody from mother is transferred to fetus via placenta) and through breast feeding (antibody transferred through breast milk).

Thus, antibodies transferred to child from mother are part of Passive immunity.

answer; a muscle cell, another neuron and a of the above