Answer:
(a) The term used is phototropism
it is because the movement of plant in the direction of light is called
phototropism.
(b) The term used is
hydrotropism it is because the movement of plant parts in response to water is
called hydrotropism.
(c) The term used is
chemotropism it is because the movement of plant parts towards chemical
substance is called chemotropism.
(d) The term used is geotropism the down
ward movement of roots in response to gravitational force is called geotropism.
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