[问答题]
The diagram represenhz(/b5c6c. 6ik gsty qb.bub :sqb9lgx39r 9qts a stem tip and 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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