What is the difference between a preserved and petrified fossil?

A preserved fossil has been stored for many years even millions. Such as a Wooly Mammoth. However, a petrified fossil only becomes a fossil after certain material has been replaced or taken out from the organism. 

Best A petrified wood is one that has been replaced with minerals. A fossil is any evidence of life that has been preserved in rock. Petrified means fossilized.Minerals replaced once living material, such as wood, creating a rock replica
Fossils: remains or traces of plant or animal life found in rocks

Petrified: process in which once living things turn to stone

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.