Which ocean lies between africa australia south asia?

Between the continents of Africa, Australia and the southern part of Asia lies the Indian Ocean. It's the third largest ocean on Earth. From the south it's bounded by Antarctica.

The Indian Ocean  lies between these three countries you stated above.

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.