Describe the factors that are responsible for the rapid climate and sea level changes of late cenozoic.

  The factors that are responsible for the rapid climate and sea level changes of late Cenozoic are:

Due to variation in the solar emissivity and the drifting in the continents. Due to the changes in the earth orbital motion.  As, increases the content of the aerosol in the atmosphere of the earth.Variation in the green house gases concentration and the radiation balance in the atmosphere of the earth.  

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.