A starfish is attached to a rock 3 inches below the level of the water at a high tide at low tide the starfish is 1 inch above the level of the water which integer shows the starfish position at low tide

Before stating the answer, please note the following:
When measuring an object above or below sea level, we can use:
a. positive integers for above sea level,
b. 0 for sea level and
c. negative integers for below sea level.

Now for the given:
1- The position of the fish is 3 in below the sea level (at low tide), this means that the position of the fish is at -3
2- The position of the fish 1 in above the sea level (at high tide), this means that the position of the fish is +1

These values are with comparison to the sea level at 0