Answer:
[tex][/tex] Based on the setup you've described, let's consider the possible outcomes for each test tube after two hours:
1. The first test tube has "light" and "stones". Without carbon dioxide, the indicator would remain red. However, if there's carbon dioxide present, the indicator will change to yellow.
2. The second test tube contains "light," "green leaf," and "mesh". Again, without carbon dioxide, the indicator would stay red. However, in the presence of carbon dioxide, the indicator will turn yellow.
3. The last test tube includes "R insects," "mesh," and "indicator". If there's no carbon dioxide, the indicator will persist in its red color. But if carbon dioxide is present, the indicator will transform to yellow.
Given these considerations, assuming that carbon dioxide is present, the indicators in all three test tubes will be yellow after two hours.
