This sounds like Lyme Disease, in its beginning stages you experience fatigue, headaches, rashes, fever, sweats, chills, muscle pain, joint pain, neck pain, and sleep issues.
Resource:
https://www.lymedisease.org/lyme-basics/lyme-disease/symptoms/
C. Sustainable energy is energy who’s source is renewable
B) Excretory System as it excretes/removes waste.
