THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -One important light response in plants is phototropism, which involves growth toward-or away from-a light source. Positive phototropism is growth towards a light source; negative phototropism is growth away from light.

Detailed explanation-2: -In the plant stem, responses to light are known as a positive phototropism, which means the stem grows towards the light. In the plant root, responses to light are known as a negative phototropism, which means the root grows away from the light.

Detailed explanation-3: -Sunlight acts as a stimulus for the growth of organisms towards the light (positive phototropism) or away from light (negative phototropism). Shoots tend to exhibit positive phototropism by growing toward it while roots show negative phototropism by growing away from it.

Detailed explanation-4: -The correct answer is Positive Phototropism.