What does the principle of faunal succession state?
a.) specific groups of organisms have followed one another in a definite sequence through the earth's history.
b.) absolute dating is required to determine the relative age of animals based on their fossils.
c.) fossils are deposited in approximately horizontal layers and spread out until they reach a barrier.
d.) rock layers with the same unique grouping of fossils are of the same geologic age.

Faunal succession it is also termed as the law of faunal succession. Success achieves when the primary purpose of doing something fulfils. We need to know how to find the most critical element in that thing and how we have done the best of our knowledge and satisfaction. Are there only areas for improvement? was there anything we could improve? when you keep working towards improving yourself, in the right manner and in the right way we can indeed be successful.
As we know very well and we have to keep on remembering that there is no shortcut to success. The faunal's success principle states that the specific groups of organisms have followed one another in a definite sequence through the earth's history and thus.
Faunal succession occurs, the reason being evolution generally progress from simple to complex in an orderly manner and none repetitive. Faunas members can distinguish from one another through time. Because on the earth there is a wide geographic distribution of organisms and strata from different geographical areas which can be correlated with each other and dated. Faunal succession is the fundamental tool of stratigraphy and comprises of the basis for the geologic time scale. Climate and conditions throughout the earth's history can be studied using the successive groups of plants and animals because they reflect their environment.