Writing a critical essay requires several challenging skills, including selecting an appropriate topic, conducting in-depth research, and presenting a well-reasoned argument. It demands critical thinking to engage with source materials, question assumptions, and analyze different perspectives. The essay must also maintain an objective tone while coherently expressing one's own thoughts. Balancing a critical analysis with avoiding purely subjective views is another difficulty. Mastering these analytical, research, and writing abilities can result in an insightful critical essay.