I throw a pair of 6-sided dice. Write down an event that has a probability of 0 and an outcome that has a probability of 1.

When two 6-sided dice are thrown, the possible sums range from 2 to 12.
Event with probability 0 : Getting a sum of 13
This cannot happen because the largest possible sum is 6 + 6 = 12
So, P(sum of 13) = 0

Event with probability 1 : Getting a sum less than 13
Every possible sum from two dice is less than 13.
So, P(sum less than 13) = 1