This is a very tricky situation because I do not know whether your school system actually teaches intelligent design in science or if it is your teacher's intent to help you understand why intelligent design is not a scientific theory at all. Intelligent design is a politically and religiously charged issue in the United States today and has been for many years.
Perhaps the best way to approach this is to write about what the scientific method is, which is to ask a question, generate a hypothesis, conduct an experiment, and then assess the results of the experiment to see if the hypothesis is supported or unsupported. Once you have a firm handle on the steps involved in the scientific method, I think you will see the impossibility of applying that method to a theory that has as its premise a religious belief. A discussion of that problem might be what your teacher wants.
I do not see how intelligent design can be evaluated as a scientific theory because it has a religious premise, that some divine power created man. Whether there is a divine power and whether that divine power created man are the subject of belief, not of scientific discussion or even speculation. How can we scientifically examine the question of a divine being or the lack thereof? Science is meant to examine evidence and try to make meaning of it. It is not meaningful or appropriate for science to evaluate a religious belief. Beliefs are not a matter of scientific evidence, and should not be treated as subjects of scientific inquiry.
I'm not sure how this question should be answered, it was given to our biology class by our teacher, so i'm not sure where to start on this.