Regarding the picture above..
I was expecting SY's answer. Which is loneliness.
From my point of view,
The tree looks lonely.
No friends. You see the other trees are far far away from it.
I feel that the tree is a optimistic kind of tree.
Keep on telling itself that it is ok to be lonely.
Because, its not fighting for sunlight , unlike its far far neighbours. =l
It can be near the sea~ like first class seat.
It can star gaze~ No other trees blocking its view.
It can admire alot stuff even thou it is lonely.

If it is a pessimistic kind,
It won't grow that huge I guess. ><
Keep on thinking, im lonely~
I have no friends to watch the calmness of the sea, the sun, stars.

So, it is optimistic right? xD
Im sorry if my words didn't make any sense.
If it is confusing, ignore it please. xD