Riddle: I can go right but seldom go left

a plan


Students: We have free audio pronunciation exercises.
Before is is is what it was?
Iscurryaroundadesk,butimnotapest whatami
ok nice it was growing and green, now is dead and singing. what is it?
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Once you are yawn my hand and feet what are you to me

i come in to colors ,some people like me more then the others ,you can find me in the mountain or the sea .A little bit of me is all you need