Question

can anyone explain... in simple word

Answer 1

Here is your ans.
Orientation of plant shoot towards light and root away from light.

Answer 2

phototropism is the tropic movement induced by light.

when a plant receives sunlight the shoot goes towards it and hence it is positive phototropism. while on the other hand the root goes away from light and hence it is negative photographic.

Environmental triggers such as light will change the directions that plant parts grow in. These directional, or tropic, movements can be either towards the stimulus, or away from it. So, in two different kinds of phototropic movement, shoots respond by bending towards light while roots respond by bending away from it.