Here is how we can formulate the questions for the given problem to resolve through:

a) A subtraction:

• If there are 317 adult animals and 250 fewer young animals, how many young animals are there?
  This question involves subtracting $250$ from $317$:
  $317 - 250 = 67$.

b) A subtraction and an addition:

• If there are 317 adult animals and the number of young animals is 250 fewer than the adults, how many animals are there in total?
  This involves two steps:

1. Find the number of young animals: $317 - 250 = 67$.
2. Add the adult and young animals together: $317 + 67 = 384$.

Let me know if you need any clarifications or additional examples.

Here are 5 related questions you can consider:

1. What percentage of the total animals are young animals?
2. If 50 more adults were added to the zoo, how many animals would there be in total?
3. What is the ratio of young animals to adult animals?
4. How many animals would there be if the number of young animals doubled?
5. If 10 adult animals and 5 young animals left the zoo, how many would remain?

Tip: Always write down the operations step by step to keep track of your calculations.