-3<-1
This is evident by looking at a number line: -3, -2, -1, 0, 1, 2, 3
Towards the left side, the numbers are lower, which makes -3 smaller (or less than) -1. It is impossible for -3 to be equal to -1 or larger because they are negative numbers.
Therefore, the most reasonable answer is -3<-1.
