Evolution would be my guess.
Answer:
c. environmental effects.
Explanation:
Based on the information provided within the question it can be said that this scenario is a perfect example of environmental effects. This term refers to the effect that external factors or conditions have on something. Which in this case since the flower color depends on the external conditions (aluminum in soil) then it is an example of environmental effects on the flowers gene expression.
They have chemoreceptors on their arms.
