Phototropism is a phenomenon seen in plants due to which the plant grows in the direction of light.
Plant hormone auxin is responsible for this mechanism of phototropism in plants; it is present in the most distant regions of the plant as well as in the tips of leaf and stem.
In this process, the plant body grows towards the range of the sunlight and is termed as positive phototropism and just in case when the plant body grows in the opposite direction of the sunlight the process is termed as negative phototropism and it usually seen in the plant roots in addition to gravitropism which is the response to the gravitational pull.
Final Answer:
Hence this is the brief explanation for the process of phototropism occurring in the plants.