The answer is enemy because they are related
The elements of design are the parts that define the visual, the tools and components that a person uses to create a composition. ... The principles of design, on the other hand, are all about how a person uses the elements to create a visual and convey a message.
Maybe the 4th one hope this helps u stay safe!
I would suggest practicing everyday. What helps me sing notes I can’t sing, is singing songs with that note in it. If you sing songs with lower notes, it’ll be easier to sing lower notes daily.