Question: A researcher observes that an organism placed in a glass container filled with water moves away when a penlight is focused on the container. The researcher concludes that the organism is light sensitive. Which other explanation for the organism's response to the light is most possible?

  Options: 
 A. The organism avoids radio waves.
 B. The organism avoids gamma rays.
 C. The organism moves away from vibrations.
 D. The organism moves away from heat sources.
Answer: D