Final Answer:
To find out how many trips are needed to distribute all the toys, we divide the total number of toys by the number of toys a car can carry in one trip. Therefore, only 1 trip is needed to distribute all the toys. The correct answer is d) 1 trip.
Step-by-step explanation:
The number of toys collected is 5², which is equal to 25 toys. The distribution constraint is that one car can carry 5² toys at a time. To find out how many trips are needed to distribute all the toys, we divide the total number of toys by the number of toys a car can carry in one trip.
Number of trips =

Number of trips =

=

= 1
Therefore, only 1 trip is needed to distribute all the toys. The correct answer is:
d) 1 trip