2. Identify which of the following are integers: a. 1.2 b. 3.9 c. 0

Integer lovers, gather 'round! An integer is a whole number that can be either positive, negative, or zero, but it can't have any decimal or fractional parts. So in our trio, only "0" makes the cut as an integer! Now, if you're wondering about those pesky decimals, here's a tip: when you're identifying integers, look for numbers without any fractional elements. So, anything like 1.2 or 3.9? Nope, those are not integers—just fun-loving numbers hanging out in the land of rational numbers!