How can the Amazon rain forest help the ecosystems of the entire planet? O
A. By providing fresh water to communities suffering from drought
B. By containing and capturing huge amounts of carbon dioxide
C. By releasing massive amounts of oxygen into the atmosphere
OD. By providing new medicines made from its wide range of plant and
animal biodiversity
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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.

Answera discharge of static electricity;

It just all depends on where you live at the moment