Ashrew is adapted for burrowing and a monkey for tree dwelling. their forelimbs appear quite different from each other's, but the internal structure of the forelimbs of these two animals is same. what do you conclude from this example?

From the example given in the question, it can be concluded that the forelimbs of the two animals are HOMOLOGOUS STRUCTURES. Homologous structures refers to organs or skeletal elements of living organisms, that appear in different animals but are common in anatomical structures, which shows that the animals have a common ancestor. Homologous structures usually have similar anatomies but they are different in functions.