Final answer:
In the embalming and preparation of infants, the heart should be given special attention due to its early development and functional importance in fetal circulation(option c).
Step-by-step explanation:
The organ that should be given special attention in the embalming and preparation of infants is the heart (c).
The heart is the first organ to form and become functional during the development of a human, emphasizing its importance for the transportation of materials to and from the developing infant. Hence, in the context of embalming practices, it is crucial to give the heart special consideration due to its early functional significance and the altered circulation patterns in infants that haven't adapted to postnatal life yet.