Phototropic movements in plants are due to?

Auxin

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Gibberellins

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Cytokinin

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Abscisic acid

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Solution

The correct option is A Auxin
Auxin is the phytohormone that handles apical dominance and positive phototropism.
It can cause the cells to elongate on the shaded side, so this side grows more.
This unequal growth of the two sides results in the stem's growth towards the light.

So, the correct answer is option A.

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Phototropic movement of shoot and geotropic movement of root are called growth movements in plants.

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