Which natural feature forms much of the border between laos and thailand?

The natural feature that forms most of the border between Laos and Thailand is the Mekong River. Mekong River is by far the biggest river in southeast Asia and by far the most important one in the region. It is also a natural feature that has set the borders between the countries in this part of the world, including these two countries.

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.