Fossils represent the remains of once-living:
a.
extant species that tell the story of human origins.
b.
plants that provide proof of catastrophism.
c.
organisms that demonstrate the age of the earth through the process of uniformitarianism.
d.
extinct organisms that provide a record of the history of life on the planet.

i think its the first one

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: