Riddle

[TowleY]

I am rectangular
Face is triangular
Wrote a 3 line poem
With a blade of grass
Where am I from

Answer is land, sea, OR air. Must state why.

Any ideas?

 

[MetroStyles]

It is a well-spoken dolphin.

 

[TowleY]

any other ideas? lol

 

[ArMiXiA]

Sea because the water carried the blade of grass to write on the sand?