Tall, Treelike Grass Used as a Cotton Substitute
Puzzle 9 of Movie Props Pack
Question is: Tall, Treelike Grass Used as a Cotton Substitute
and the answer is: BAMBOO
Word Meaning:
BAMBOO — Any of the fast-growing grasses of the Bambusoideae subfamily, characterised by its woody, hollow, round, straight, jointed stem.
Definitions from Wiktionary.