Final answer:
The angle at which a baby's car seat should be set depends on their age and development. For newborns, the car seat should be set at a 45-degree angle in a rear-facing position. As the baby grows and gains more head control, the angle can be adjusted to a more upright position.
Step-by-step explanation:
The angle at which a baby's car seat should be set depends on the age and development of the baby. For newborns and very young babies, the car seat should be set in a rear-facing position at a 45-degree angle. This helps to support the baby's head and neck and prevent them from slumping forward.
As the baby grows and gains more head control, the car seat angle can be adjusted to a more upright position. By the time the baby is able to sit up with support, the car seat can be set in a more vertical position.
It's important to follow the specific instructions provided by the car seat manufacturer and consult with a pediatrician if you have any concerns or questions about the proper angle for your baby's car seat.