Context: Read the text.
Biologists can look at how related two animals are by comparing their body parts, or structures. Analogous structures are parts with the same purpose but with different structures, like a fin and a flipper. Different species may develop analogous structures when they live in similar environments even if they aren't closely related.
Homologous structures, however, may show that species are related by indicating they have common ancestors. A whale is a mammal, which makes it more closely related to a bear than to a fish, and a whale's flipper has bones like those in a bear's paw. Though they are different shapes and sizes, the arrangement of bones is similar.
Which term matches the picture?
A. analogous structures
B. homologous structure
Determine the correct option from the provided choices and reply with its corresponding letter.
Answer: B