Scientists classify organisms into groups, usually with a dichotomous key. Using a dichotomous key is like solving a puzzle, one in which you make choices about the organisms you are trying to classify. To classify this organism, you must complete the second tier of this dichotomous key. What would be the BEST choice for the second tier?

Asize of body

Binsect or sea creature

Csix legs or eight legs

Dtwo body segments or three body segments