Final answer:
The guardian indicates an understanding of car seat use by stating that they will secure the car seat using the seat belt and latch system.
Step-by-step explanation:
The correct answer is Option 3: "I will secure the car seat using the seat belt and latch system." This statement indicates that the guardian understands the proper way to secure the car seat. It is important to use both the seat belt and the latch system to ensure maximum safety for the infant. Option 1 is incorrect because it is not recommended to place the car seat in the front seat as it can be dangerous in the event of an accident. Option 2 is also incorrect because infants should be placed in rear-facing car seats for their safety. Option 4 is incorrect because it is important to ensure that the car seat straps are properly secured and snug for the infant's safety.