What evolutionary concept explains the superficial similarity between pangolins and unrelated scaly animals like armadillos?

Answer

Convergent evolution.

The similar evolution of traits like defensive armor and an insectivorous diet in unrelated species due to similar environmental pressures is defined as convergent evolution.

What evolutionary concept explains the superficial similarity between pangolins and unrelated scaly animals like armadillos?
animalclassificationpangolin