Why are you living ?

Why are you living ?

This is not first time this question is coming in my mind.I dont understand, what all are running after?
Why it is that every morning a person goes out in field to earn something?
Why it is that plant is growing?
Why it is that in Sun so much explosion is there every millisecond?
Why Earth is rotating?
Why planets are revolving?
I really dont know and am unable to find answer.
Forget about that extrahuman thing.
Limiting our thoughts to just human i have question why are we living?I mean why everyday we get up and work?
Are you thinking
food? shelter?
Then I think animals also do same.They get out everyday for food and shelter.Than whats difference between human and animals?
After thinking lot I can only get is that just for pleasure or satisfaction.
And that pleasure or satisfaction comes by urge for sex and by urge for importance.
Urge for sex is however again common thing between humans and animals.It is natures most effective way of survival of species.
Left is 'urge for importance' which distinguishes humans from animals.Humans crave for importance.When they get importance they feel pleasure/satisfaction.And you can find thousands of examples in history regarding crave for importance.
I think crave for importance is the only factor which makes person to become terrorist.
You want to become rich,you want to have big cars,you want to be in news,you want to have big business...all because you want peoples to recognise you and give you importance.
And that will indirectly jet leak neurotransmitters in your brain activating papez circuit(emotional circuit in brain) and giving you feeling of pleasure.
What do you think?