The United States is very large and has many different cultural regions. The American South has its own dialect and lifestyle that is very different from the lifestyle and culture found in California or New England. Over the past several centuries, a distinct American culture has arisen as these cultures converge in large part due to

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.

Answer the zagros mountains, stretch across western iran and are located next to the khuzestan plain; answer( zagros mountains

Answer accretion;