Answer: C
Explanation:
The investigation madw by Charles Darwin is just a theory, although He is one of the most known scientific all over the world, there were many other important ones before him, we know it thank to his book "the origin of the species" where he mentions scientifics that support this idea about hereditate the most resistant phsical and geneeticall character in every generation, he didn't discover the laws of genetic heredity, he just create a theory more solid than other ones before, and explained how the prevalence and biodiversity is caused by this biological process.