[问答题]
The diagram represents a stem tip and9s/1r:jzpfk jv l-oa+ pfl +-lufra0(the position of the Sun.
1.On the diagram above, draw an arrow to indicate the direction of movement of auxin.
2.（1）State the term used to describe the directional growth of a plant in response to light.
（2）Outline how this process affects growth in the stem tip.
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