Final answer:
The fontanelles are soft spots in a baby's skull that gradually close and ossify after birth, allowing the skull to develop and grow.
Step-by-step explanation:
The subject of this question is Health. The fontanelles, which are soft spots in a baby's skull, are the specific anatomical feature being referred to. Fontanelles are broad areas of fibrous connective tissue that form joints between the skull bones in newborns. They gradually close and ossify after birth, allowing the skull to develop and grow.