As Christianity spread in Europe, it melded in some ways with folk and ethnic religious practices of the people in the areas. For instance, some scholars think that Christianity’s holy days may have moved to fall on the same day as traditional celebrations to make Christianity more relevant to the native culture. This would be an example of what phenomenon? syncretism

synchronicity

solemnity

symbolism

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.

Climate change to earth function human can't reduce climate

Answerinflux;

Yes, it’s awesome
: )