Question

which method of forming questions is this? ¿por qué termina la estudiante la tarea?
options: intonation, adding
o\, question words, inversion

Explanation:

The Spanish question uses "Por qué" (a question word meaning "why") to initiate the question, which matches the "question words" method of forming questions. The other options do not apply: intonation alone would not use a question word, adding "no" creates negative statements/questions, and inversion swaps subject and verb (here the subject la estudiante follows the verb termina but the question is driven by the question word).

Answer:

question words