doesn't think require "of bamboo as a tree or bush" in order to have meaning?
Here, think is a transitive verb.
http://www.testmagic.com/knowledge_base/toefl/exercises/grammar/transitive_intransitive/intro_01.htm
how to grab reader's attention
small parts of wild plants
To identify the verb in the sentence, you need to look for the word that expresses the action or state of being. In this case, the verb is "think." "Think" is an intransitive verb because it does not require a direct object to complete its meaning. In this sentence, it stands alone and does not act on or affect anything directly.
