The organs of different animals that are having a similar structure but differ in their functions are called [[1]] .

Organs that are similar in function but different in structure are called analogous organs because, in evolutionary biology, the term analogous structures pertain to the various structures in different species having the same function but have evolved separately, thus do not share a common ancestor. Examples of analogous structures are wings of insects and birds used for flying.

Hence, the correct answer is homologous organs.