Any one knows Jane Eyre's novel , my teacher gave us questions and i need help please the questions are uploaded down

Iwould say a but i don’t know what words are underlined

  i think you forgot to put the options but if your reffering to this question then your answer will be "b"  a. add "to" to the base form to create an adjective.b. when the subject of a sentence is singular, add "–s" to the base form.c. add "–ed" to irregular base forms to form the past participle.d. do not use a base form with plural subjects

Where is the underlined word