Hello, Thanks for making your post on brainly!
I would say the best answer is C)Mixture
A mixer is made by combining 2 or more elements, but your not making a new element. And there are no chemical reactions happening to make a new element.
Hope this helps. Have a great day.
Objects in the fountain appear to be somewhere but isnt
Eyepiece, finder-scope, optical tube, aperture, focuser, and mount