Question

1. experiment i demonstrates a response to ..... figure a. light. b. touch. c. gravity. d. ph. e. temperature.

Explanation:

Step1: Observe Figure III

In Figure III, the plant is growing towards the light source, which is a typical phototropism - a plant's response to light.

Step2: Analyze other options

There is no indication of touch, gravity, pH, or temperature influencing the plant's growth in the given figures.

Answer:

A. Light.