The appearance of sentence fragments is your answer.
Can you post the actual question with the shown sentences?
The argumentative essay requires well-researched, accurate, detailed, and current information to support the thesis statement and consider other points of view. Some factual, logical, statistical, or anecdotal evidence should support the thesis. ... It is unethical to exclude evidence that may not support the thesis.
Give out a " What kind of learner are you " quiz
The Word Lake is prepositional, so i guess,"Walked alongside the Lake."