Answer:
Is a less than or greater than b?
Is c less than or greater than b?
Explanation:
Since we already know that both a and b are less than 0, they will be to the left of the 0 marker on the numberline. All you need to know is which is greater or smaller.
The same goes for c and d. Both are greater than 0 so they will be to the right of the 0 marker on the numberline. All you need to know is which is greater or smaller.