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Mary put a plant on a table in her room. After a few weeks, she saw that the stem of the plant was starting to bend toward the window. What makes the stem of Mary’s plant bend toward the window?

A) the need for light
B) the need for water
C) the heat of the Sun
D) the force of gravity

User Doradus
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 a. the need for light
User Serhii Popov
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