You don’t have any options so idk
Answer:
Answer is PHOTONS, named by Einstein
A synonym for observation could be remark.
I would have to say Proteins, lipids, and carbohydrates. Carbohydrates being the first energy source, lipids second and lasting the longest, and proteins the third and final source. although you did not give the full question, so i do not know if i can be completely sure.
