Final answer:
The correct statement about opposites is that they are numbers located on opposite sides of 0 on a number line.
Step-by-step explanation:
The correct statement about opposites is: Option 1: Opposites are numbers located on opposite sides of 0 on a number line.
Opposites are numbers that have the same absolute value but different signs. For example, -5 and 5 are opposites because they are both 5 units away from 0 on a number line but have different signs. Option 2, 3, and 4 are not true statements about opposites. Option 2 is not always true, as the sum of opposites can be any negative or positive number. Option 3 is not true, as the product of opposites is always negative. Option 4 is also not true, as opposites can be the same distance from 0 but have different signs.