Evolution is the change in hereditary features of the group of organisms over time.
Comparing the evolution theories between Charles Darwin and Jean Baptiste Lamarck.
Charles Darwin
Both
Jean Baptiste Lamarck
Individuals are produced during generation so they can survive.
Living things can overproduce and more of them are produced than being able to survive. They also have different variation between the offsprings that make a individual different from the other species.
They both thought life had changed and is better suited and adapted to the environment.
Lamarck is known for his theory of inheritance. If organisms change in life they will adapt to the environment and the changes will affect the offsprings that they create.