Many blood vessels only have innervation from the division of the ans.

It is defined with low energy expenditure and normal bodily maintenance (resting and digesting). The parasympathetic division effect on many body functions is a calming. Sympathetic and the parasympathetic division are The two subsystems of ANS .These two divisions often innervate the same target organs and have cooperative or contrasting effects.  

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.

idk and i also need to know where are those bio brainy acts lol