The correct answer is C. They are derived by similar environmental constraints.
Step-by-step explanation:
In biology, an analogy refers to two or more types of organism that have structures or behaviors with the same function but do not share a common ancestor which means the structures or behaviors that are similar or identical developed independently. This can be explained due to similar conditions or constraints in the environment that force organisms of different environments to evolve in the same way. This concept differs from homologous traits because in homologous there is not a similarity in function and they involve a common ancestor. Considering this, the correct statement is "they are derived by similar environmental constraints" because they occur due to similar adaptative situations.