Which Swimmer from Australia won 4 gold medals at Tokyo Olympics 2020 - 2021?

Solution:

1. The question asks to identify the Australian swimmer who won four gold medals at the Tokyo Olympics in 2020-2021.
2. Based on the provided options, Emma McKeon is the correct answer. She won four gold medals and three bronze medals at the Tokyo 2020 Olympics, setting a new Olympic record.

Answer: Emma McKeon