The right option is; 2. the evolutionary process through which new species emerge
Speciation is an evolutionary process which results to the formation of new, distinct species that are reproductively isolated from one another due to reproductive barriers that are created as a result of physical, or genetic differences between the new species. The four geographic types of speciation are; allopatric, peripatric, parapatric, and sympatric speciation.
"A. labelling food supplies" and "B. monitoring water supplies" are both public health measures that have helped fight disease. Vaccinations are essential to public health.
