NDA English Synonyms

Aggressive' is closer to the opposite of the word 'extinct'. 'Scattered' means spread far apart. 'Feeble' means lacking strength. All of these are irrelevant to the meaning of the word 'extinct'. 'Non-existent' mean shaving no living members (like dinosaurs) which is exactly what the statement is talking about. So 'nonexistent' is the best answer.