Rachel should use simple sentences to explain the task clearly and effectively to her brother. However, she could also use compound sentences to break down the steps of the task into smaller parts for easier understanding.

Rachel should use simple sentences to explain the task clearly and effectively to her brother. However, she could also use compound sentences to break down the steps of the task into smaller parts for easier understanding.

Rachel can start by saying, "First, gather all the ingredients on the counter. Then, preheat the oven to 350 degrees. Next, mix the dry ingredients in one bowl and the wet ingredients in another. After that, slowly combine the two mixtures together. Finally, pour the batter into a greased pan and bake for 30 minutes."