I would say estuary, because that's where a fresh water river and an ocean meet, and that leads to a transition between salt to fresh water.
To find the similarities and differences in organisms by using possible chromosome and physical characteristics.
Light energy can be converted to heat energy. Electrical energy can be converted to mechanical energy, light energy, heat energy, etc. Chemical energy can be converted to electrical energy.
There would be more Carbon Dioxide because plants use CO2 when they go through photosynthesis.
