What is the difference between an ecoregion and a region?

The difference is:

1. An ecoregion is an area that is known for its environmental conditions, landscapes, and soil

2. A region is an area that is part of a country or some parts of the world

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.

Cthat is the answer