What is the smallest integer that is greater than or equal to -2.5?

The smallest integer that is greater than or equal to -2.5 is -2. When considering integers, we look for whole numbers that satisfy the condition given in the question.

To find the integer that meets this criterion, we begin with -2.5 and recognize that -2 is the first whole number that is greater than -2.5. This means that while -3 is less than -2.5, -2 sits right above it on the number line, fulfilling the requirement of being greater than or equal to -2.5.

The other options do not fit this requirement, as -3 is less than -2.5, -1 is also greater than -2 but is not the smallest integer that remains above -2.5, and 0 is far greater than -2. Therefore, -2 is the appropriate answer, as it is the least integer that fulfills the condition of being greater than or equal to -2.5.