What two examples may be converted into fossil fuels after being buried under pressure for a long period of time?
a. used can
b. plants
c. animal waste
d. electronic waste
e. chemicals

this is math not biology xd

i thinking chemical change

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.