The movement of sunflower in accordance with the path of Sun is due to :

Phototropism

The correct answer is Option (2) – Phototropism

Environmental triggers such as light, or gravity 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.

The movement of the sensitive plant in response to touch is very quick. The movement of sunflowers in response to day or night, on the other hand, is quite slow.

The response of plant components to light is known as phototropism.,Phototropism is beneficial to plants because it allows them to maximise their photosynthetic capability.

It is one of numerous plant tropisms, or motions, that are triggered by external stimuli.