In the photic zone where sunlight penetrates the water, food webs are fueled by abundant primary producers. since sunlight does not reach the deep sea, what adaptations do 1) marine vertebrates and 2) invertebrates of the deep sea have to obtain their food? if you were a deep-sea animal, describe what one would you be and why you think you would be successful at competing for food against other organis

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.

Master planned communities outside of chicago. note: population density means people living in an area per square mile. chicago, an urban and highly populated area has a much more higher density than a desert, amish community, settlement, or nomadic region.