Answer is: D (fallopian tube)
The rate of change is the slope of the line that connects the two endpoints
Biogeographic isolation : Isolation through distribution of Species in geographic space and time
so , one of the answer is The isolation of two populations of the same species
By doing this, decrease the chance of any cross breeds between species, which eventually will led to Speciation
Carbon could form to Carbohydrates, Lipids, Proteins and Nucleic Acids when bonded with other carbon atoms