Find the correct descending order of integers from the following options?

We know that numbers placed on the right side of the number line are greater than the numbers placed on the left side.

Therefore, a positive number is always greater than a negative number. Therefore, $200 >-200 \mathrm{and} -300$.

By observing the number line, we can say that in negative integers, the greater the number, the smaller its value. That means $-200 >-300$.

So, based on that,

200, -200, -300 is the correct descending order of integers from the given options.