![](https://www.koko.org/wp-content/uploads/2020/04/tree.jpg)
Koko signs "TREE"
Penny & Darlene sign "TREE"
GSL (Gorilla Sign Language: Modified ASL + Natural Gestures)
ASL (American Sign Language)
Koko signs "TREE"
Penny & Darlene sign "TREE"
GSL (Gorilla Sign Language: Modified ASL + Natural Gestures)
ASL (American Sign Language)
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