Final answer:
The developmental achievement that is not typical for a 6-month-old infant is the 'Pincer grasp of small objects'. This is because this fine motor skill tends to develop around ten months of age, unlike the other listed achievements such as 'Able to hold bottle', 'Ability to sit with support', and 'Social smile and laugh', which are common for an infant of six months.
Step-by-step explanation:
The developmental achievements of the average 6-month-old infant include a variety of physical and social milestones. However, one of the options provided does not typically occur by 6 months of age. Let's take a look at each option:
- Able to hold bottle: By around six months, many infants can grasp a bottle and may even start holding it during feedings.
- Ability to sit with support: Infants around this age can often sit up with the assistance of pillows or an adult, indicating that they are developing adequate muscle strength and coordination.
- Social smile and laugh: Infants typically begin to smile socially at around 6 weeks and will laugh out loud by the fourth month, which indicates that their social and emotional development is progressing normally.
The option that is not typical for a 6-month-old infant is:
- Pincer grasp of small objects: This fine motor skill usually develops around ten months of age when infants can pick up small objects using the tips of their thumb and forefinger.
Therefore, option c. Pincer grasp of small objects is the one that is not a developmental achievement of the average 6-month-old infant.