Who among the following is an Australian Aboriginal poet?

The correct option is Kath Walker.

Kath Walker (later known as Oodgeroo Noonuccal) was a prominent Australian Aboriginal campaigner, artist, and poet. She was the first Aboriginal Australian to publish a book of verse, We Are Going, in 1964, which established her as a key literary figure and voice for indigenous rights in Australia.

Here is a brief context on the other individuals mentioned in the options to understand why they are not the correct answer:
- Judith Wright was a celebrated non-Indigenous Australian poet, environmentalist, and campaigner for Aboriginal land rights.
- Robert Frost was a highly renowned American poet, famous for his depictions of rural life in New England.
- Maya Angelou was an acclaimed American memoirist, poet, and civil rights activist.