The correct answers are D. An article describing a new treatment for cancer and E. An essay explaining aerodynamics
Step-by-step explanation:
Scientific writing is a type of nonfictional writing (it focuses on reality) commonly used to communicate the findings of scientific research or any other information related to science or any of the fields that are part of it such as psychology, physics, medicine, etc. Additionally, scientific writing is always formal and include articles, essays, reports, etc. This implies from the options presented the ones that are examples of this type of writing include "An article describing a new treatment for cancer" and "An essay explaining aerodynamics" because these focus on topics that belong to science (medicine and aerodynamics) and the type of material (article and essays) also belong to this type of writing. Besides, these are the only options that are part of nonfictional and formal writing.