it is important because they need to survive. as Darwin theory puts it , its not the strongest that survive but the one who is more adaptable to change.
for example. jellyfish have stingers which it uses to slow down its prey
The answer is false as light dependent reactions use light energy to complete stages of photosynthesis.
Answer:
The sympathetic nervous system originates in the spinal cord and its main function is to activate the physiological changes that occur during the fight-or-flight response. This component of the autonomic nervous system utilises and activates the release of norepinephrine in the reaction.
I am pretty sure that it is the last one. Sorry if I'm wrong, but I hope it helps!