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In a plant that is bending toward a light source, why does the redistribution of auxin...

In a plant that is bending toward a light source, why does the redistribution of auxin result in the plant bending toward the light?

Since auxin stimulates cell growth, cells grow more rapidly on the 'dark' side of the plant, causing it to bend toward the light.

Auxin is produced at lower levels on the light side of the plant, which stimulates cells to absorb lower levels of light.

Since auxin stimulates cell growth, cells grow more rapidly on the 'light' side of the plant, causing it to bend toward the light.

Auxin is produced at higher levels on the light side of the plant, which stimulates cells to absorb greater levels of light.
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Answer #1

Auxin is a hormone found in plants which stimulates cell growth causing stem elongation or bending. Also, auxin is light sensitive, it is more active in absence of light. So, the reason why plants bend towards light is, due to presence of light, auxins in the plant body come to the dark side of the stem and do their work for stem elongation. As a result, the plant has more cell growth on the dark side rather than the light side.

So, appropriate answer is the first one.

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