Carbon is a chemical substance found in the Earth but not formed by plants or animals.
Fossil Fuels such as coal, oil, and natural gas.
Photolysis is important because it is a chemical decomposition process caused by radiant energy or light. It is essential to plants using photosynthesis to survive and the animals that need to eat those plants for energy to survive.
If a lake were polluted by acid rain, it would have to be detoxified before it would be safe again for plants and animals. The detoxification process would involve introducing into the lake a substance that could neutralize the bad chemicals.
The effects are, damaging the plants by crushing them and maybe even well kill animals.
fossil
There are many they are generically called minerals and are what rocks are made from. An example would be the mineral Olivine or the element Gold.
Fossil Fuels
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Plastic is artificial because it is not (formed as) a natural substance, not in or by living organisms, like animals, plants or microbes.
chlorophyll.
The animals die and the chemical goes into the soil for the plants and when the animals eat the plants the chemicals are passed back to the plants.
Sedimentary rocks formed from the remains of plants and animals are called organic sedimentary rocks. Examples include coal, formed from the remains of plants, and limestone, formed from the shells of marine organisms.
the sun
The release of energy in plants and animals food is chemical energy.
Plants depend upon the activities of animals for a continuing supply of which substance carbon dioxide. Plants will combine water and carbon dioxide to process food.
water
Chlorophyll