Any process that exerts a stress on a rock that eventually causes it to break into smaller fragments is a type of mechanical weathering.
Answer:
a lake where light is being refracted from the water
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I believe the answer is Unicellular Euglena.
Euglena are unicellular organisms classified into the kingdom protista, and the phylum euglenophyta. All euglena have chloroplast and can make their own food by photosynthesis. They are considered to have both plant and animal features. The mobility of Euglena also allows for hunting capability, because of this adaptation.
This a tough one, and technically they all have to do with an authoritative body enforcing an environmental policy. But the most specific ones of them all would be the first sentence and the last two sentences.
