Answer: Since the student is writing a critical essay, he/she should not just summarise the work, but also evaluate it.
Explanation: Just to elaborate a little on the answer, it can be added that the goal of a critical essay is to evaluate somebody's work, in this case the U.S. Declaration of Independence, and, consequently, to make it more understandable. A critical essay is, therefore, subjective, since the author is giving his/her opinion of a text. This student has done the analysis - he has identified some of the main ideas of Jefferson's thesis - but he has neglected to identify the purpose of the text and to evaluate Jefferson's success in reaching that purpose.