3. Does she walk in the park every day? - Yes, she ./No, she

Для ответа на вопрос нужно использовать вспомогательный глагол do/does.

1. Does she walk in the park every day? - Yes, she does./No, she doesn't.

Перевод:

1. Она гуляет в парке каждый день? - Да./Нет.

Ответ: Yes, she does./No, she doesn't.