Question

1. the illustration below shows how the hormone auxin causes a plant to grow in response to the sun over time. this response is best classified as which of the following? image of plant growth over time with sun options: positive phototropism, negative hydrotropism, negative thigmotropism, positive geotropism

Explanation:

The question describes a plant's growth response to the sun (light) mediated by auxin. Positive phototropism is the directional growth of a plant toward a light source, which matches the scenario. Hydrotropism relates to water, thigmotropism to touch, and geotropism to gravity—none of which are the stimulus here.

Answer:

A. positive phototropism