what's our system of naming organisms called, and what are the two most specific categories of organization?

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form

Can someone i have no idea of how to do this.

Speed is the ratio of the distance of an object moves to