It was believed that a asteroid hit the Earth (specifically Mexico) when the asteroid hit it caused a freezing darkness due to dust and debris being kicked up by the asteroid . The dust and debris blocked the sunlight causing a temperature drop.
No a solution is not a combination a combination is when you combine something
Answer;
Radial nerve
Explanation
-The nerve that is most likely to be damaged as a result of his injury is the radial nerve.
-The radial nerve is a nerve in the human body that supplies the posterior portion of the upper limb.
-It innervates the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin.
The answer is environmental stress
Correct me if I'm wrong but I believe it is the Gravity (or Gravitational Pull) from the Sun.