Final answer:
The three typical temperamental classifications of an infant are easy, difficult, and slow-to-warm-up, indicating a genetic basis and category of behavior shown from an early stage in life.
Step-by-step explanation:
The typical classifications for the temperament of an infant are easy, difficult, and slow-to-warm-up. These temperaments are believed to have a biological basis and appear very early in our lives. The easy temperament is characterized by positive emotions, adaptability, and the ability to regulate emotions. Infants with a difficult temperament show more negative emotions, have a harder time adapting to change, and struggle with emotional regulation. Lastly, slow-to-warm-up infants are more reserved and take longer to adapt to new situations or people. Environmental factors and maturation also play a role in how these temperaments are expressed throughout a child's development