D. Where did Anna draw a picture for the competition? She drew a picture ...

Обоснование: В тексте написано: "One day Anna's teacher had a drawing competition at school. Anna wanted to draw something interesting. She went to the park. Anna drew a big tree and colourful flowers." Это ясно указывает на место, где Анна рисовала свою картину для конкурса.

Ответ: 1) in the park.