Answer: The second question answer: Sympathetic nervous system.
Explanation: The sympathetic nervous system directs the body's rapid involuntary response to dangerous or stressful situations. A flash flood of hormones boosts the body's alertness and heart rate, sending extra blood to the muscles
Kilocalorie
This is the measurement for chemical energy
First and foremost, the first one I would check off is letter B.
The only other option I would choose is E.