Question

growth of a plant shoot toward or away from light. hydrotropism phototropism gravitropism thigmotropism

Explanation:

To solve this, we analyze each option:

• Hydrotropism: Response to water, not light. Eliminate.
• Phototropism: Defined as plant growth toward/away from light. Matches the description.
• Gravitropism: Response to gravity, not light. Eliminate.
• Thigmotropism: Response to touch, not light. Eliminate.

Answer:

B. phototropism