Final Answer:
Infant temperament refers to the inherent and stable individual differences in a baby's behavioral and emotional responses to the environment.
Step-by-step explanation:
Activity Level: The extent to which an infant is physically active or inactive.
Emotionality: The intensity and frequency of emotional reactions, such as joy, distress, or anger.
Sociability: The baby's preference for and response to social interactions, indicating whether they are more outgoing or reserved.
Adaptability: The ease with which an infant adjusts to changes in routines or new situations.
Rhythmicity: The regularity and predictability of the baby's biological functions, such as sleep and feeding schedules.