Which of the following is NOT written by Margaret Atwood?

The correct option is The Stone Angel.

To understand why this is the correct choice, let us examine the authorship of each of the novels listed in the options:
1. The Edible Woman: Published in 1969, this was Margaret Atwood's debut novel, which explores themes of consumerism, gender roles, and identity.
2. Surfacing: Published in 1972, this is a highly acclaimed novel by Margaret Atwood that delves into national identity, gender, and the search for self-discovery in the Canadian wilderness.
3. The Handmaid's Tale: Published in 1985, this is Margaret Atwood's most famous dystopian novel, depicting the totalitarian regime of Gilead.
4. The Stone Angel: Published in 1964, this celebrated novel was written by the Canadian author Margaret Laurence. It is the first of Laurence's Manawaka series and is not a work of Margaret Atwood.

Therefore, because The Stone Angel was written by Margaret Laurence, it is the only novel in the list not authored by Margaret Atwood.