Which of the following is not a sign of a chemical change? color change odor production heat production shape change

Color change 
Odor change
Heat production are all normal changes that can take place with a chemical reaction. Not all of them will appear as a symptom, but if one of them does, you likely have some sort of chemical change.

The only thing you could be suspicious of is a change in shape. That might happen with some sort of physical occurrence, like going beyond a melting point, but not a chemical one.

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Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.