The sample space is give by multiplying all the options available.
Number of animals = 4
Type = 2
So 4 x 2 = 8 = number of elements of sample space
The total ammount of outcomes must match the number of elements of sample space so to speak, 8 outcomes.
For each animal can be cartoon or realistic.
4 animals x 2 types = 8 outcomes.
Answer: first option to the left.