Final answer:
The best clincher sentence to restate the topic 'There are many fun things a person can do to help the brain' is 'By acting with purpose, a person really can use fun to help the brain.' It successfully echoes the main idea and provides an effective summary without introducing new information.
Step-by-step explanation:
The clincher sentence that best restates the topic sentence "There are many fun things a person can do to help the brain" would be "By acting with purpose, a person really can use fun to help the brain." This sentence encapsulates the main idea expressed in the topic sentence by emphasizing that fun activities, when done with intention, can be beneficial to brain health. It serves as an effective conclusion because it doesn't introduce new information but rather summarizes the central theme.
When writing an essay, a clincher sentence is vital in your conclusion as it should echo the main points without imposing new ideas, just as the chapter on cognitive illusions and biases explains that cognitive assessments should be reflective. Applying this advice, the clincher sentence should tie back to the main idea that enjoyable activities can play a meaningful role in maintaining a healthy brain, which aligns closely with the aim of working thesis development.