Final answer:
The statement by the guardian that indicates an understanding of the teaching is option (b) I should never leave my baby unattended on a changing table.
Step-by-step explanation:
The statement by the guardian that indicates an understanding of the teaching is option (b) I should never leave my baby unattended on a changing table. This statement shows that the guardian understands the importance of supervising the baby closely to prevent injuries, such as falls, while on the changing table.
Option (a) I should make sure my baby's clothing does not have buttons on it is incorrect because buttons on clothing can pose a choking hazard to infants.
Option (c) I should always strap my baby into a car seat, even for short trips is incorrect because it is not related to injury prevention at home.
Option (d) I should make sure my baby's crib has firm sides and no loose bedding is incorrect because it is related to safe sleep practices rather than injury prevention during wakeful activities.